Flood Alert Info - Upper River Colne and Radlett Brook
Area Description
The Upper River Colne and Radlett Brook at Colney Heath, London Colney, Borehamwood and Radlett.
This is a Flood Alert Area. For this area the highest level of flood notification that you will receive is a Flood Alert. No Flood Warnings or Severe Flood Warnings are issued for this area.
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There are no Flood Alerts currently in force for this area. See below for historical flood warnings.
Area Covered by this Flood Alert
The orange highlighted area on the map below outlines the area covered by this Flood Alert.
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Flood Alert History
Number of historic Flood Alerts that have previously been recorded for this area:
We can provide a Flood Insurance Quote for properties in the Hatfield area
Historical Flood Alerts for this Area
Flood Alert issued on 1 Oct 2024 17:54
River Colne
Rising river levels due to heavy rainfall this afternoon may result in flooding this evening until tomorrow afternoon.
No property flooding is expected.
Low-lying land is most at risk including Waterside, Lowbell Lane, London Colney and Warrengate Road.
Further rainfall is forecast this evening.
We are closely monitoring the situation and monitoring rainfall and river levels.
Take care and avoid walking, cycling or driving through flood water.
This message will be updated by 9am tomorrow, Wednesday 2nd October, or as the situation changes.
Flood Alert issued on 29 Sep 2024 18:07
River Colne
Rainfall forecast overnight may cause river levels to rise resulting in flooding.
No property flooding is expected but low lying land may be affected, particularly near Waterside, Lowbell Lane, London Colney and Warrengate Road.
Flooding is possible overnight from Sunday to Monday from midnight.
We are monitoring river levels and closely monitoring the situation.
Avoid using low lying footpaths and any bridges near local watercourses.
This message will be updated by 9am on Monday 30th September, or as the situation changes.
Flood Alert issued on 27 Sep 2024 08:09
River Colne
River levels may rise again due to heavy rain overnight, and further showers today.
Property flooding is not expected, but areas most at risk include Waterside, Lowbell Lane, London Colney and Warrengate Road.
We are monitoring rainfall and river levels and closely monitoring the situation.
Avoid using low lying footpaths and any bridges near local watercourses.
This message will be updated by 6pm on 27 September 2024, or as the situation changes.
Flood Alert issued on 26 Sep 2024 16:29
River Colne
Flooding of roads and low lying land is possible, property flooding is not expected.
Areas most at risk include Waterside, Lowbell Lane, London Colney and Warrengate Road.
We are monitoring rainfall and river levels and closely monitoring the situation.
Avoid using low lying footpaths and any bridges near local watercourses.
This message will be updated by 9:00 am on 27 September 2024, or as the situation changes.
Flood Alert issued on 23 Sep 2024 17:43
River Colne
River levels remain high on the Upper River Colne and Radlett Brook.
Flooding may continue to affect locations near the Radlett Brook; Colne; Mimmshall Brook, with low lying land and roads expected to be most affected, particularly around Waterside; Lowbell Lane; London Colney; Warrengate Road.
Further light rainfall is forecast this evening, which may cause river levels to rise again, but no further flooding is expected.
We are closely monitoring the situation and checking rivers for blockages.
Avoid using low lying footpaths and any bridges near local watercourses.
Monitor local water levels and weather conditions.
This message will be updated by 10:00 AM on 24/09/2024, or as the situation changes.
Flood Alert issued on 23 Sep 2024 10:11
River Colne
We have seen heavy rain across the area overnight into Monday 23 September. Rising river levels throughout the morning may lead to flooding.
Flooding is forecast to affect locations near the Radlett Brook; Colne; Mimmshall Brook, with low lying land and roads expected to be most affected, particularly around Waterside; Lowbell Lane; London Colney; Warrengate Road.
Further heavy rainfall is forecast this morning. Weather conditions are expected to improve throughout Monday afternoon and no further flooding is expected.
We are monitoring the situation closely.
Take care and avoid walking, cycling or driving through flood water.
This message will be updated by 4:00pm Monday 23 September, or as the situation changes.
Flood Alert issued on 22 Sep 2024 20:29
River Colne
We have seen heavy rain across the area throughout today, Sunday 22nd September. Rising river levels throughout the evening and overnight may lead to flooding.
Flooding is forecast to affect locations near the Radlett Brook; Colne; Mimmshall Brook, with low lying land and roads expected to be most affected, particularly around Waterside; Lowbell Lane; London Colney; Warrengate Road.
Further heavy rainfall is expected overnight. Weather conditions are expected to improve tomorrow afternoon and no further flooding is expected.
We are monitoring the situation closely.
Take care and avoid walking, cycling or driving through flood water.
This message will be updated by 10am tomorrow, Monday 23rd September, or as the situation changes.
Flood Alert issued on 15 Jul 2024 19:34
River Colne
Rising river levels throughout this evening may lead to flooding.
Flooding is possible from 11:00 PM on Monday 15th July.
Areas most at risk include Waterside, Lowbell Lane, London Colney and Warrengate Road.
Weather conditions are expected to improve tomorrow evening and no further flooding is expected.
Take care and avoid walking, cycling or driving through flood water.
This message will be updated by 10:00 AM on Tuesday 16th July, or as the situation changes.
Flood Alert issued on 23 May 2024 08:58
River Colne
River levels are forecast to begin falling throughout the day, but the risk of flooding to low-lying land remains.
No further rainfall is forecast.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 5:00 PM on 23/05/2024, or as the situation changes.
Flood Alert issued on 22 May 2024 18:32
River Colne
River levels are now falling steadily as rainfall eases.
Flooding is forecast to affect locations near the Radlett Brook; Colne and Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside; Lowbell Lane; London Colney and Warrengate Road.
River levels are now falling steadily, but the risk of flooding to low-lying land remains.
The forecast is dry for tomorrow..
We are monitoring rainfall and river levels and are checking rivers for blockages in the area.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10:00 AM on 23/05/2024, or as the situation changes.
Flood Alert issued on 22 May 2024 07:23
River Colne
River levels are high the Radlett Brook, Colne, and Mimmshall Brook.
Areas most at risk include Waterside, Lowbell Lane, London Colney, and Warrengate Road.
Further rainfall is forecast throughout the morning.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
We will continue to monitor levels closely.
This message will be updated by 5pm on 22/05/2024, or as the situation changes.
Flood Alert issued on 28 Apr 2024 16:35
River Colne
River levels remain high but are beginning to fall on the Radlett Brook; upper Colne and Mimmshall Brook.
No further rainfall is forecast.
We will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 9:00 AM on 29/04/2024, or as the situation changes.
Flood Alert issued on 28 Apr 2024 08:56
River Colne
River levels are remaining high on the Radlett Brook; Colne; and Mimmshall Brook due to heavy rainfall.
Areas most at risk of flooding include Waterside; Lowbell Lane; London Colney; and Warrengate Road.
Further rainfall is forecast this morning.
We will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 5:00 PM on 28/04/2024, or as the situation changes.
Flood Alert issued on 27 Apr 2024 18:30
River Colne
Further heavy rainfall is forecast overnight which will cause river levels to rise again.
Flooding is forecast to affect locations near the Radlett Brook; Colne; Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside; Lowbell Lane; London Colney; and Warrengate Road.
We will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 09:00 AM on 28/04/2024, or as the situation changes.
Flood Alert issued on 26 Mar 2024 19:08
River Colne
River levels have risen on the Radlett Brook, River Colne and Mimmshall Brook due to heavy rainfall today, Tuesday 26th March. Flooding is forecast to affect low lying land near these watercourses, particularly around Waterside, Lowbell Lane, London Colney and Warrengate Road. We are monitoring rainfall and river levels, and are checking rivers for blockages in the area. You should avoid walking, cycling or driving through flood water. Monitor local water levels and weather conditions.
The forecast for tomorrow is mostly dry but further heavy rainfall is forecast on Thursday 28th March, which could cause river levels to rise again.
This message will be updated by 10am on Wednesday 27th March, or as the situation changes.
Flood Alert issued on 12 Mar 2024 17:11
River Colne
River levels remain high on the Radlett Brook, River Colne and Mimmshall Brook due to heavy rainfall.
Flooding continues to affect low lying land near these watercourses, particularly around Waterside, Lowbell Lane, London Colney and Warrengate Road.
We are monitoring rainfall and river levels, and are checking rivers for blockages in the area.
Monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated by 10am, Wednesday 13th March, or as the situation changes.
Flood Alert issued on 12 Mar 2024 10:28
River Colne
River levels have risen on the Radlett Brook, River Colne and Mimmshall Brook due to heavy rainfall on Tuesday 12th March.
Flooding is forecast to affect low lying land near these watercourses, particularly around Waterside, Lowbell Lane, London Colney and Warrengate Road.
We are monitoring rainfall and river levels, and are checking rivers for blockages in the area.
Monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated by 6pm on Tuesday 12th March, or as the situation changes.
Flood Alert issued on 2 Mar 2024 18:50
River Colne
River levels remain high but are beginning to fall on the Radlett Brook, Borehamwood Brook, River Colne in Colney Heath and on the Mimmshall Brook. However, river levels are rising slowly on the River Colne in London Colney due to the rain today, Saturday 2nd March.
Low lying land next to the river may be most affected but no property flooding is expected. The forecast is mostly dry for overnight and tomorrow.
We are monitoring rainfall and river levels.
Monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated by 10am on Sunday 3rd March, or as the situation changes.
Flood Alert issued on 2 Mar 2024 08:15
River Colne
River levels are rising on the Radlett Brook, Colne, and Mimmshall Brook due to heavy rainfall.
No property flooding is currently expected.
Further rainfall is forecast throughout today, Saturday 2nd March. We will continue to monitor levels closely.
Monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated by 6pm today, or as the situation changes.
Flood Alert issued on 22 Feb 2024 17:21
River Colne
River levels are rising steadily on the Radlett Brook; Colne and Mimmshall Brook due to heavy rainfall today.
Flooding is forecast to affect low lying land, particularly around Waterside; Lowbell Lane; London Colney and Warrengate Road.
No further significant rainfall is expected.
We will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10am on 23 February 2024, or as the situation changes.
Flood Alert issued on 22 Feb 2024 13:36
River Colne
River levels are rising on the Radlett Brook; Colne and Mimmshall Brook due to heavy rainfall.
Flooding is forecast to affect low lying land, particularly around Waterside; Lowbell Lane; London Colney and Warrengate Road.
Further rainfall is forecast throughout the afternoon.
River levels are rising at the Warrengate Road gauge.
We will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 8:00 PM on 22 February 2024, or as the situation changes.
Flood Alert issued on 21 Feb 2024 11:55
River Colne
River levels are expected to rise on the Mimmshall Brook.
No property flooding is expected.
Further rainfall is forecast throughout today, with heavy rain forecast for Thursday.
River levels are beginning to rise at the Warrengate Road gauge.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 8:00 PM on 21/02/2024, or as the situation changes.
Flood Alert issued on 18 Feb 2024 17:38
River Colne
River levels remain high on the Radlett Brook, River Colne, and Mimmshall Brook due to heavy rainfall.
Flooding is forecast to affect locations near the Radlett Brook, Colne, and Mimmshall Brook on Sunday 18th February, with low lying land expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road.
Further light rainfall is forecast this evening and tomorrow, Monday 19th February.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area. Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10am on Monday 19th February, or sooner if the situation changes.
Flood Alert issued on 18 Feb 2024 10:00
River Colne
River levels remain high on the Radlett Brook, River Colne, and Mimmshall Brook due to heavy rainfall.
Flooding is forecast to affect locations near the Radlett Brook, Colne, and Mimmshall Brook on Sunday 18th February, with low lying land expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road.
Further rainfall is forecast throughout the day.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area. Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 6pm on Sunday 18th February, or sooner if the situation changes.
Flood Alert issued on 17 Feb 2024 19:44
River Colne
River levels are expected to rise quickly on the Radlett Brook, River Colne, and Mimmshall Brook due to heavy rainfall which is forecast this evening, Saturday 17th February, and into the early hours of Sunday 18th February.
Flooding is forecast to affect locations near the Radlett Brook, Colne, and Mimmshall Brook from 1am on Sunday 18th February, with low lying land expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area. Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10am on Sunday 18th February, or sooner if the situation changes.
Flood Alert issued on 10 Feb 2024 09:44
River Colne
River levels are forecast to rise on the Radlett Brook; Colne and Mimmshall Brook.
Flooding is forecast to affect locations near the Radlett Brook; Colne and Mimmshall Brook.
Further rainfall is forecast this afternoon.
We will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 6:00 PM on 10/02/2024, or as the situation changes.
Flood Alert issued on 9 Feb 2024 17:51
River Colne
River levels remain high but are beginning to fall on the Radlett Brook; Colne and Mimmshall Brook due to rainfall.
Flooding may continue to affect locations near the Radlett Brook; Colne and Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside; Lowbell Lane; London Colney and Warrengate Road.
Further light rainfall is forecast over the weekend.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10:00 AM on 10/02/2024, or as the situation changes.
Flood Alert issued on 9 Feb 2024 10:49
River Colne
River levels remain high on the Radlett Brook; Colne and Mimmshall Brook due to rainfall.
Flooding is forecast to affect locations near the Radlett Brook; Colne and Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside; Lowbell Lane; London Colney and Warrengate Road.
Further rainfall is forecast this morning and river levels may continue to rise.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 06:00 PM on 09/02/2024, or as the situation changes.
Flood Alert issued on 8 Feb 2024 14:21
River Colne
River levels are forecast to rise on the Radlett Brook; Colne; Mimmshall Brook due to rainfall.
Flooding is forecast to affect locations near the Radlett Brook; Colne; Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside; Lowbell Lane; London Colney; Warrengate Road.
Further rainfall is forecast overnight.
River levels are high and are forecast to continue rising overnight.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10:00am on 09/02/2024, or as the situation changes.
Flood Alert issued on 5 Jan 2024 20:03
River Colne
River levels remain high on the Colne and Mimmshall Brook, due to heavy rainfall. The forecast is now improving with little significant rain forecast. River levels have fallen in most locations but remain high in others, particularly around London Colney. River levels are expected to drop further overnight and through tomorrow.
We will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated in the morning, on Saturday 6th January, or as the situation changes
Flood Alert issued on 5 Jan 2024 10:45
River Colne
River levels are high on the Colne and Mimmshall Brook, due to heavy rainfall. The forecast is now improving with little further rain forecast. River levels will begin to fall in most locations but remain high in others, particularly around London Colney.
Flooding is forecast to affect locations near the Colne and Mimmshall Brook today, Friday 5th January. Low lying land will be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road.
We will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated this evening on Friday 5th January, or as the situation changes.
Flood Alert issued on 4 Jan 2024 17:00
River Colne
River levels are forecast to rise on the Colne and Mimmshall Brook, due to heavy rainfall.
Flooding is forecast to affect locations near the Colne and Mimmshall Brook, from 6pm today, Thursday 4th January. Low lying land is expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road.
Further rainfall is forecast throughout the evening.
River levels are forecast to rise at the Radlett, Warrengate Road, London Colney, and Borehamwood gauges.
We will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10am on Friday 5th January, or as the situation changes.
Flood Alert issued on 3 Jan 2024 10:06
River Colne
River levels are high on the Radlett Brook, Colne, and Mimmshall Brook due to heavy rainfall.
Flooding is forecast to continue to affect locations near the Radlett Brook, Colne, and Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road.
River levels are expected to fall throughout Wednesday 3rd January.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 6pm Wednesday 3rd January, or as the situation changes.
Flood Alert issued on 2 Jan 2024 18:13
River Colne
River levels remain high on the Radlett Brook, river Colne and Mimmshall Brook due to recent heavy rainfall.
Flooding is forecast to affect locations near the Radlett Brook, Colne and Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road. The river is expected to peak this evening, Tuesday 2 January.
Light rainfall is forecast tomorrow, Wednesday 3 January, so river levels are expected to begin to fall from early morning.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area. Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10am on Wednesday 3 January, or as the situation changes.
Flood Alert issued on 2 Jan 2024 10:03
River Colne
River levels are high on the Radlett Brook, river Colne and Mimmshall Brook due to heavy rainfall last night, Monday 1 January and through to this morning, Tuesday 2 January.
Flooding is forecast to affect locations near the Radlett Brook, Colne and Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road. The river is expected to peak at 4pmtoday, Tuesday 2 January.
Light rainfall is forecast tomorrow, Wednesday 3 January, so river levels are expected to begin to fall from this afternoon.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area. Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 6pm on Tuesday 2 January, or sooner if the situation changes.
Flood Alert issued on 1 Jan 2024 17:35
River Colne
River levels are rising on the Radlett Brook, river Colne, and Mimmshall Brook due to heavy rainfall.
Flooding is forecast to affect locations near the Radlett Brook, Colne, and Mimmshall Brook from 10pm this evening, Monday 1 January, with low lying land expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road.
Further rainfall is forecast tomorrow, Tuesday 2 January, so river levels are expected to remain high.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area. Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10am on Tuesday 2 January, or sooner if the situation changes.
Flood Alert issued on 19 Dec 2023 15:57
River Colne
River levels are high on the Radlett Brook, Colne and Mimmshall Brook due to heavy rainfall throughout today (Tuesday 19 December).
The forecast is dry overnight, but river levels are expected to remain high.
We will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10:00 AM on 20/12/2023, or as the situation changes.
Flood Alert issued on 12 Dec 2023 15:44
River Colne
River levels are rising on the Radlett Brook, Colne, and Mimmshall Brook due to heavy rainfall throughout today, Tuesday 12th December.
Flooding is forecast to affect locations near the Radlett Brook, Colne, and Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road. Further rainfall is forecast throughout today and river levels are expected to peak by midnight tonight
The forecast for tomorrow, Wednesday 13th December and the following 2 days is drier so river levels are expected to start falling and the risk of flooding will reduce.
We will continue to monitor the forecast and deploy teams to clear any blockages in the river as necessary. Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10am on Wednesday 13th December, or sooner if the situation changes.
Flood Alert issued on 10 Dec 2023 08:54
River Colne
River levels have fallen on the Upper Colne following heavy rainfall over the last three days. However, further heavy rainfall today, Sunday 10th December, is forecast to push river levels higher again meaning the risk of flooding to roads and low lying land remains.
The forecast for Monday 11th December and Tuesday 12th December is much drier so we expect that the risk of flooding will start reducing from tomorrow.
We are closely monitoring the situation. Our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages and clearing debris from structures. Please avoid using low lying footpaths near local watercourses as there may be standing water in some locations.
This message will be updated by 5pm on Sunday 10th December, or as the situation changes.
Flood Alert issued on 9 Dec 2023 16:35
River Colne
River levels are high but steady on the Upper River Colne as a result of heavy rainfall over the last three days and the risk of flooding to roads and low lying land remains.
Further light rainfall is forecast this evening, Saturday 9th December, and tomorrow, but while river levels may remain high through today and tomorrow, Sunday 10th December, we do not expect river levels to rise again.
We are closely monitoring the situation. Our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages and clearing debris from structures. Please avoid using low lying footpaths near local watercourses as there may be standing water in some locations.
This message will be updated by 9am on Sunday 10th December, or as the situation changes.
Flood Alert issued on 9 Dec 2023 09:40
River Colne
River levels are rising on the Radlett Brook, Colne, and Mimmshall Brook due to heavy rainfall this morning, Saturday 9th December.
Flooding is forecast to affect locations near the Radlett Brook, Colne, and Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road. Further rainfall is forecast throughout today and river levels will continue to remain high.
We will continue to monitor the forecast and deploy teams to clear any blockages in the river as necessary. Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 5pm on the 9th December, or as the situation changes.
Flood Alert issued on 13 Nov 2023 13:00
River Colne
River levels are high on the Radlett Brook, Colne, and Mimmshall Brook due to rainfall.
Flooding is forecast to affect locations near the Radlett Brook, Colne, and Mimmshall Brook, with low lying land expected to be most affected, particularly around Waterside, Lowbell Lane, London Colney, and Warrengate Road.
The forecast is dry for throughout the afternoon, and river levels should start to slowly fall.
We will continue to monitor the forecast.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 7pm on 13/11/2023, or as the situation changes.
Flood Alert issued on 2 Nov 2023 05:57
River Colne
Flooding is possible in this area.
Monitor local water levels and weather conditions. Avoid using low lying footpaths or entering areas prone to flooding. Start acting on your flood plan if you have one.
Environment Agency Flood Warning Officers set the river or tidal levels that have triggered this message. During industrial action this message has been automatically issued based on rising river or tidal levels.
Flood Alert issued on 29 Oct 2023 02:13
River Colne
Flooding is possible in this area.
Monitor local water levels and weather conditions. Avoid using low lying footpaths or entering areas prone to flooding. Start acting on your flood plan if you have one.
Environment Agency Flood Warning Officers set the river or tidal levels that have triggered this message. During industrial action this message has been automatically issued based on rising river or tidal levels.
Flood Alert issued on 20 Sep 2023 16:53
River Colne
River levels are rising on the Radlett Brook; Colne; Mimmshall Brook due to heavy rainfall.
Flooding is possible at Waterside; Lowbell Lane; London Colney; Warrengate Road from 06:00 PM on 20/09/2023.
Further heavy rainfall is forecast overnight and we will continue to monitor levels closely.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 10:00 AM on 21/09/2023, or as the situation changes.
Flood Alert issued on 30 Mar 2023 17:49
River Colne
Flooding is possible in this area.
Monitor local water levels and weather conditions. Avoid using low lying footpaths or entering areas prone to flooding. Start acting on your flood plan if you have one.
Environment Agency Flood Warning Officers set the river or tidal levels that have triggered this message. During industrial action this message has been automatically issued based on rising river or tidal levels.
Flood Alert issued on 14 Jan 2023 13:46
River Colne
Flooding is possible in this area.
Monitor local water levels and weather conditions. Avoid using low lying footpaths or entering areas prone to flooding. Start acting on your flood plan if you have one.
The Environment Agency Flood Warning System has issued this message based on rising river or tidal levels.
We are temporarily automating our messages due to industrial action.
Flood Alert issued on 12 Jan 2023 09:59
River Colne
Flooding is possible in this area.
Monitor local water levels and weather conditions. Avoid using low lying footpaths or entering areas prone to flooding. Start acting on your flood plan if you have one.
The Environment Agency Flood Warning System has issued this message based on rising river or tidal levels.
We are temporarily automating our messages due to industrial action.
Flood Alert issued on 8 Jan 2023 19:37
River Colne
River levels have risen on the Radlett Brook, Colne and Mimmshall Brook due to heavy rainfall on Sunday 8 January.
Flooding is forecast to continue affecting locations near these rivers.
Light rain showers are possible this evening but no further significant rainfall is forecast for the remainder of Sunday 8 January. Monday is expected to be mostly dry before further rainfall is forecast on Tuesday 10 January.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 09:00 AM on 09/01/2023, or as the situation changes.
Flood Alert issued on 8 Jan 2023 15:03
River Colne
River levels are rising on the Radlett Brook; Colne; Mimmshall Brook due to heavy rainfall this afternoon.
Flooding to low lying land is forecast to affect locations near the Radlett Brook; Colne; Mimmshall Brook on Sunday 8 January.
No property flooding is expected.
Further rainfall is forecast this afternoon and Monday 9 January is expected to be mostly dry. Some further heavy rainfall is possible on Tuesday 10 January.
We are monitoring rainfall and river levels and are checking rivers for blockages in the area.
Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water.
This message will be updated by 08:00 PM on 08/01/2023, or as the situation changes.
Flood Alert issued on 31 Dec 2022 19:47
River Colne
Flooding is possible in this area.
Monitor local water levels and weather conditions. Avoid using low lying footpaths or entering areas prone to flooding. Start acting on your flood plan if you have one.
The Environment Agency Flood Warning System has issued this message based on rising river or tidal levels.
We are temporarily automating our messages due to industrial action.
Flood Alert issued on 17 Nov 2022 09:57
River Colne
We have seen heavy rainfall across the area overnight into Thursday 17 November. This has caused the Upper Colne at Colney Heath to rise.
River levels have now peaked and are dropping down again.
There is likely to be flooding to low lying land and roads close to the river tonight and into tomorrow morning. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
No flooding to properties is currently expected.
Avoid walking, cycling or driving through flood water.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
We expect to remove this flood alert by this evening.
Flood Alert issued on 6 Nov 2022 19:53
River Colne
River levels are high but steady on the Upper River Colne and Radlett Brook because of persistent heavy rainfall today, Sunday 6 November. The risk of flooding to roads and low lying land is now reducing but river levels remain high.
Further light rainfall is forecast this evening, Sunday 6 November and tomorrow, but we do not expect river levels to rise again as a result. We expect river levels to remain high overnight until tomorrow morning, Monday 7 November.
We are closely monitoring the situation. Our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages and clearing debris from structures.
Please avoid using low lying footpaths near local watercourses as there may still be standing water in some locations.
This message will be updated by 9am on Monday 7 November, or as the situation changes.
Flood Alert issued on 6 Nov 2022 12:01
River Colne
Heavy rain has fallen over south Hertfordshire this morning, Sunday 6th November. River levels on the Upper River Colne and other rivers and streams in the area are rising, particularly in Colney Heath.
There is likely to be flooding to low lying land and roads close to the river today. Flooding from surface water, where water gathers and flows off road surfaces, could also occur. However, property flooding is not currently expected.
Rivers are likely to stay high for much of the day, with further heavy showers possible. Avoid walking, cycling or driving through flood water.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated at 8pm or as the situation changes.
Flood Alert issued on 3 Nov 2022 17:47
River Colne
River levels are high but steady on the Upper River Colne and Radlett Brook as a result of persistent heavy rainfall on Wednesday 2nd and Thursday 3rd November 2022. The risk of flooding to roads and low-lying land is now reducing but river levels remain high.
Further light rainfall is forecast this evening, Thursday 3rd November 2022 but we do not expect river levels to rise again as a result. We expect river levels to remain high overnight until tomorrow morning, Friday 4th November.
We are closely monitoring the situation. Our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages and clearing debris from structures.
Please avoid using low lying footpaths near local watercourses as there may still be standing water in some locations.
This message will be updated by 9am on Friday 4th November, or as the situation changes.
Flood Alert issued on 3 Nov 2022 06:25
River Colne
We have seen heavy rainfall across the area overnight into Thursday 3 November. River levels on the Upper River Colne, Mimmshall Brook, Borehamwood Brook and other rivers and streams in the area are rising.
The main areas of concern are currently Borehamwood and Colney Heath.
There is likely to be flooding to low lying land and roads close to the river today. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
Rivers are likely to stay high for much of the day, with further heavy rain possible.
Avoid walking, cycling or driving through flood water.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated at 6pm or as the situation changes.
Flood Alert issued on 15 Feb 2022 18:22
River Colne
Today, Tuesday 15 February we have seen consistent rain causing river levels in the Upper Colne to rise.
There is likely to be flooding to low lying land and roads close to the river in Colney Heath.
Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
No flooding to properties is currently expected.
Avoid walking, cycling or driving through flood water and follow any local diversion routes.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
Overnight the forecast should improve, river levels should drop and we expect to be able to remove this alert in the morning, Wednesday 16 February.
Flood Alert issued on 26 Dec 2021 20:42
River Colne
River levels remain high on the Upper River Colne and Radlett Brook as a result of heavy rainfall. River levels are expected to remain high overnight on Sunday 26 December and flooding to roads and low lying land will continue. Areas most at risk are Park Lane and Colney Heath areas.
We are closely monitoring the situation, checking rivers for blockages and clearing debris from structures.
Please monitor local water levels and weather conditions. You should avoid walking, cycling or driving through flood water and using low lying footpaths near local watercourses.
This message will be updated tomorrow morning, 27/12/21, or as the situation changes.
Flood Alert issued on 26 Dec 2021 08:45
River Colne
River levels are rising on the Upper River Colne and Radlett Brook as a result of heavy rainfall. River levels are expected to remain high Sunday 26 December and flooding to roads and low lying land will continue. Areas most at risk are Park Lane and Colney Heath areas.
We are closely monitoring the situation, checking rivers for blockages and clearing debris from structures.
Please monitor local water levels and weather conditions. You should avoid walking, cycling or driving through flood water and using low lying footpaths near local watercourses.
This message will be updated this evening, 26/12/21, or as the situation changes.
Flood Alert issued on 25 Dec 2021 19:18
River Colne
River levels have risen on the Upper River Colne and Radlett Brook as a result of heavy rainfall. Further rainfall is forecast overnight into tomorrow, Sunday 26th December.
River levels are expected to remain high and flooding to roads and low lying land will continue. Areas most at risk are Park Lane and Colney Heath areas.
We are closely monitoring the situation, checking rivers for blockages and clearing debris from structures.
Please monitor local water levels and weather conditions. You should avoid walking, cycling or driving through flood water and using low lying footpaths near local watercourses.
This message will be updated tomorrow morning, 26/12/21, or as the situation changes.
Flood Alert issued on 25 Dec 2021 06:58
River Colne
Due to wet weather yesterday and overnight river levels have risen and have reacted to overnight showers today, Saturday 25 December.
The main area of concern is currently Colney Heath where river levels have risen the most. There is likely to be flooding to low lying land and roads close to the river. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
You should avoid walking, cycling or driving through flood water.
There is further rain expected today and overnight, we expect the river to remain high over the weekend. No flooding to properties is currently expected.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated this evening or earlier if the situation changes
Flood Alert issued on 20 Oct 2021 22:04
River Colne
Heavy and persistent rain is forecast over Hertfordshire overnight and into the early hours of tomorrow morning, Thursday 21 October.
We expect river levels on the Upper River Colne to rise and minor flooding of low lying land, roads and gardens close to the river in Colney Heath and London Colney is possible.
Flooding from surface water, where water gathers and flows off road surfaces, could also occur and cause issues during the Thursday morning rush hour.
No flooding to properties is currently expected.
Avoid walking, cycling or driving through flood water and follow any local diversion routes.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated tomorrow morning or earlier if the situation changes
Flood Alert issued on 5 Oct 2021 10:31
River Colne
Overnight on Monday we have seen heavy rainfall in the River Colne catchment. This has meant that levels in the Colne have risen again.
The main areas of concern are the Colney Heath and London Colney areas. Levels suggest that there will be flooding to low lying land and roads close to the river today (Tuesday 5 October). Flooding from surface water could also occur.
We expect the river to remain high before falling later, as today, Tuesday, is expected to be a mostly dry day.
Take care near the areas of concern and monitor your local weather conditions.
We are continuing to monitor river levels and have staff in the field checking for and clearing blockages.
This message will be updated by 7pm today or earlier if the situation changes.
Flood Alert issued on 4 Oct 2021 20:35
River Colne
This alert is being issued based on the forecast heavy rainfall on Monday night 4 October into Tuesday morning 5 October.
We have seen river levels in the Colne rise in response to recent rainfall over the weekend. Although they have since dropped we expect levels to rise again in response to the overnight rainfall.
The main area of concern is currently Colney Heath and London Colney where river levels are expected to rise. There is likely to be flooding to low lying land and roads close to the river this evening. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We expect the river to rise and remain high overnight. No flooding to properties is currently expected.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated on Tuesday morning or earlier if the situation changes
Flood Alert issued on 2 Oct 2021 20:34
River Colne
Throughout the day on Saturday 1 October we have seen heavy rainfall across the area. This has caused the River Colne to rise.
The main area of concern is currently Colney Heath and London Colney where river levels have risen the most. There is likely to be flooding to low lying land and roads close to the river this evening. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We expect the river to remain high this evening but should start to recede on Sunday. No flooding to properties is currently expected.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated on Sunday morning or earlier if the situation changes.
Flood Alert issued on 18 Jun 2021 15:55
River Colne
River levels are rising on the Upper River Colne and Radlett Brook as a result of heavy rainfall. Flooding of roads and low lying land in the Borehamwood area is possible from 3:30pm on Friday 18 June. Flooding to properties is not currently expected.
Further heavy rainfall is forecast in the afternoon and this evening. We expect river levels to remain high on Friday.
We are closely monitoring the situation. Our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages.
Please monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated tomorrow morning, Saturday 19 June, or as the situation changes.
Flood Alert issued on 31 Jan 2021 08:18
River Colne
Heavy Rain has fallen across the Colne catchment over the last few days and the Upper Colne river levels are steady but remain high.
Flooding to low lying land and roads close to the river is expected to continue and flooding from surface water could also occur. The main areas of concern are at Colney Heath, London Colney, Borehamwood and Radlett. Flooding to properties is not expected.
No further rainfall is forecast today Sunday 31st January with river levels expected to remain high.
Take care near the areas of concern, avoid entering flood water and continue to monitor your local conditions.
We are continuing to monitor river levels closely and remain on standby to respond if required.
This message will be updated this evening, Sunday 31 January or earlier if the situation changes
Flood Alert issued on 30 Jan 2021 20:40
River Colne
Heavy Rain has fallen across the Colne catchment over the last few days. River levels in the Upper Colne have risen again on Saturday 30 January and remain high.
Flooding to low lying land and roads close to the river is expected to continue overnight and into tomorrow. Flooding from surface water could also occur. The main areas of concern are at Colney Heath, London Colney, Borehamwood and Radlett. Flooding to properties is not expected.
No further rainfall is forecast for the remainder of the weekend. River levels are expected to remain high overnight before reducing on Sunday.
Take care near the areas of concern, avoid entering flood water and continue to monitor your local conditions.
We are continuing to monitor river levels closely and remain on standby to respond if required.
This message will be updated tomorrow morning, Sunday 31 January or earlier if the situation changes.
Flood Alert issued on 30 Jan 2021 09:01
River Colne
Overnight on Friday we have seen heavy rainfall across the area and further rain is now falling today, Saturday 30 January. River levels in the Upper Colne catchment are now rising again in response to this.
The main areas of concern are at Colney Heath, London Colney, Borehamwood and Radlett. Flooding to low lying land and roads close to the river is still possible overnight and into tomorrow. Flooding from surface water could also occur.
Take care near the areas of concern and monitor your local weather conditions.
We are continuing to monitor river levels closely and on standby to respond if required.
This message will be updated on Saturday evening, 30 January or earlier if the situation changes
Flood Alert issued on 29 Jan 2021 21:17
River Colne
Over the last 48 hours we have seen heavy rainfall across the area. River levels in the Upper Colne catchment have fallen throughout the day on Friday, but remain very sensitive. Further rainfall is forecast from the early hours of Saturday 30 January and it is possible river levels will rise once again in response to this.
The main areas of concern are at Colney Heath, London Colney, Borehamwood and Radlett. Flooding to low lying land and roads close to the river is still possible overnight and into tomorrow. Flooding from surface water could also occur.
Take care near the areas of concern and monitor your local weather conditions.
We are continuing to monitor river levels closely and have standby to respond if required.
This message will be updated on Saturday morning, 30 January or earlier if the situation changes.
Flood Alert issued on 29 Jan 2021 09:41
River Colne
Over the last 48 hours we have seen some heavy rainfall. Levels are still rising slightly at some locations in the Upper Colne catchment. Further heavy rainfall is forecast from the early hours of Saturday 30 January and it is possible river levels will rise in response to this.
The main areas of concern are at Colney Heath, London Colney, Borehamwood and Radlett. Flooding to low lying land and roads close to the river is still possible and flooding from surface water could also occur.
We expect the river to remain high throughout Friday.
Take care near the areas of concern and monitor your local weather conditions.
We are continuing to monitor river levels and have staff in the field checking for and clearing blockages.
This message will be updated on Friday evening or earlier if the situation changes
Flood Alert issued on 28 Jan 2021 20:01
River Colne
Over the last 24 hours we have seen some heavy rainfall. River levels are still rising in some locations on the River Colne. Further rainfall is forecast overnight on Thursday 28 January and it is possible river levels will rise in response to this.
The main areas of concern are at Colney Heath, London Colney, Borehamwood and Radlett. Flooding to low lying land and roads close to the river is still possible and flooding from surface water could also occur.
We expect the river to remain high throughout Thursday night.
Take care near the areas of concern and monitor your local weather conditions.
We are continuing to monitor river levels and have staff in the field checking for and clearing blockages in this location.
This message will be updated on Friday morning or earlier if the situation changes
Flood Alert issued on 28 Jan 2021 07:53
River Colne
Throughout Wednesday night we have seen heavy rainfall across the area. This has caused the River Colne to rise.
The main area of concern is currently the Colney Heath area where river levels have risen the most. There is likely to be flooding to low lying land and roads close to the river today on Thursday 28 January. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We expect the river to remain high on Thursday. Some further rainfall is forecast overnight tonight.
We are constantly monitoring river levels and have staff on standby to clear any blockages.
This message will be updated on Thursday evening or earlier if the situation changes
Flood Alert issued on 15 Jan 2021 11:09
River Colne
Although the heaviest rainfall has now passed, river levels remain high in the Upper Colne catchment and particularly in the London Colney area.
Most locations have seen river levels drop overnight. In areas where they are still high, water levels have now largely stabilised and should begin to drop away during today (Friday 15 January). However, some further rain is forecast on Saturday. Although this rainfall will be less than we have received in the last few days it will fall on saturated catchments and could cause river levels to rise again.
Flood waters may be deep and fast flowing in this area. Residents are strongly urged to take action now. Remain safe and be aware of your local surroundings.
We will be closely monitoring the situation throughout the day and we have staff available to clear any blockages in the river. This message will be updated on Friday evening or as the situation changes.
Flood Alert issued on 14 Jan 2021 20:27
River Colne
Over the last 24 hours we have seen heavy rainfall in the area. This means that water levels in the river Colne have risen. The heaviest rain has now passed, with further light rainfall forecast.
We expect the river to remain high and there is likely to be flooding to low lying land and roads close to the river throughout the night on Thursday 14 January. Flooding from surface water, where water gathers and flows off road surfaces, could also occur. The main areas of concern are Colney Heath, London Colney and Borehamwood.
We are closely monitoring the situation and will issue a Flood Warning if property flooding is expected. You should avoid walking, cycling or driving through flood water.
Take care near the areas of concern and monitor your local weather conditions.
We are continuing to monitor river levels and have staff in the field checking for and clearing blockages in this location.
This message will be updated on Friday morning or earlier if the situation changes.
Flood Alert issued on 14 Jan 2021 07:39
River Colne
Overnight into Thursday we have seen consistent heavy rainfall across the area. This has caused rivers and streams to rise.
The main areas of concern are currently Colney Heath, London Colney and Borehamwood where river levels have risen the most. There is likely to be flooding to low lying land and roads close to the river throughout the day on Thursday. Flooding from surface water, where water gathers and flows off road surfaces, could also occur. Other areas of the catchment are also likely to see flooding later in the day.
We expect the river to remain high today as further rain is forecast during the day. We are closely monitoring the situation and will issue a Flood Warning if property flooding is expected. You should avoid walking, cycling or driving through flood water.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated this afternoon or earlier if the situation changes.
Flood Alert issued on 27 Dec 2020 08:34
River Colne
River levels are rising on the Upper River Colne and Radlett Brook as a result of heavy overnight rainfall. Flooding of roads and low lying land is possible from around 09:00 on Sunday 27 December. Surface water flooding is also possible. We expect flooding to affect the Colney Heath area but flooding to properties is not expected. River levels are likely to remain high throughout the day on Sunday.
Our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages.
Please monitor local water levels and weather conditions. You should avoid walking, cycling or driving through flood water and avoid using low lying footpaths near local watercourses.
This message will be updated this evening, 27/12/2020, or as the situation changes.
Flood Alert issued on 3 Dec 2020 22:07
River Colne
Heavy rain today, Thursday 3 December, is affecting the upper River Colne upstream of Colney Heath. River levels are rising slowly and may come out of banks in some low lying areas.
Another band of showers is forecast overnight so river levels are likely to remain high into the early hours of tomorrow morning. Flooding to low lying land, roads and riverside gardens is possible overnight and into tomorrow morning. Surface water flooding may also affect these areas.
We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We are monitoring rainfall and river levels and are checking rivers for blockages. We will update this message by 9am tomorrow morning or earlier if the situation changes.
Flood Alert issued on 25 Oct 2020 10:01
River Colne
Over the last 24 hours we have seen heavy rainfall in the Waterside, Lowbell Lane, London Colney and Warrengate Road area. This has meant that the River Colne has been rising. Some further isolated showers are possible today although rainfall totals will be much lower than those seen in the last 24 hours.
Levels suggest that there will be flooding to low lying land and roads close to the River Colne from today (Sunday 25th October). Flooding from surface water could also occur.
We expect the river to remain high throughout today though no flooding to properties is forecast, and warnings are not expected to be issued.
Take care near the areas of concern and monitor your local weather conditions.
We are constantly monitoring river levels and have staff in the field checking for, and clearing blockages in this location.
This message will be updated by 7pm today or earlier if the situation changes.
Flood Alert issued on 24 Oct 2020 21:53
River Colne
River levels are rising on the Upper Colne and Radlett Brook as a result of heavy rainfall. Flooding of roads and low lying land is possible on Saturday evening into Sunday morning (25th October 2020) if the heaviest rain affects the Waterside, Lowbell Lane, London Colney and Warrengate Road areas.
Further rainfall is forecast this evening and showers will follow from early Sunday morning. We expect river levels to remain high overnight.
We are closely monitoring the situation. Our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages.
Please monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated tomorrow morning (25th October 2020) or as the situation changes.
Flood Alert issued on 4 Oct 2020 20:13
River Colne
The Upper River Colne remains high because of the heavy rain this weekend. The river is rising slowly in London Colney, but is now falling in Colney Heath. No more heavy rain is due overnight and there may be some light rain tomorrow, Monday 5 October. Flooding to low lying lands and roads is still possible. Surface water may also be affecting these areas.
We do not anticipate any flooding of properties, but will continue to monitor rainfall and river levels and check rivers for blockages.
We recommend you continue to monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We will update this message by 9am tomorrow or earlier if the situation changes.
Flood Alert issued on 4 Oct 2020 08:54
River Colne
More than 80mm of rain has fallen in the past 48 hours over parts of the River Colne catchment. The Upper River Colne remains high, particularly in the Colney Heath area. Most of the heavy rain has now passed, however river levels are will remain high for most of the day, meaning flooding to low lying lands and roads is still likely. Surface water may also be affecting these areas.
We do not anticipate any flooding of properties, but will continue to monitor rainfall and river levels and check rivers for blockages.
We recommend you continue to monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We will update this message by 8pm this evening, or earlier if the situation changes.
Flood Alert issued on 3 Oct 2020 19:27
River Colne
Over the last 24 hours we have seen heavy rainfall causing river levels in the Upper River Colne to rise, particularly in the Colney Heath area. Further rainfall is forecast tonight and into tomorrow (Sunday 4th October) meaning flooding to low lying lands and roads is still likely. Surface water may also be affecting these areas.
We do not anticipate any flooding of properties, but will continue to monitor rainfall and river levels and check rivers for blockages.
We recommend you continue to monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We will update this message at 9am tomorrow morning, or earlier if the situation changes.
Flood Alert issued on 3 Oct 2020 11:15
River Colne
Heavy rainfall yesterday and today, Saturday 3 October, has caused levels in the Upper River Colne to rise, particularly in the Colney Heath area.
There is likely to be flooding to low lying land and roads close to the river today. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We expect the river to remain high for the rest of the day. No flooding to properties is currently expected.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated by 8pm this evening or earlier if the situation changes.
Flood Alert issued on 28 Aug 2020 19:55
River Colne
Heavy, thundery showers have affected North London and Hertfordshire today, Friday 28 August. Further rain is possible this evening.
Flooding to low lying land, roads and riverside gardens is possible this evening. Surface water flooding may also affect these areas.
We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We are monitoring rainfall and river levels and are checking rivers for blockages. We will update this message by 9am tomorrow morning or earlier if the situation changes.
Flood Alert issued on 28 Aug 2020 14:36
River Colne
Heavy, thundery showers are affecting North London and Hertfordshire today, Friday 28 August. It is currently unclear which areas will experience the heaviest rain.
Flooding to low lying land, roads and riverside gardens is possible this afternoon. Surface water flooding may also affect these areas.
We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We are monitoring rainfall and river levels and are checking rivers for blockages. We will update this message by 8pm today or earlier if the situation changes.
Flood Alert issued on 28 Aug 2020 09:07
River Colne
Heavy rain over Hertfordshire and North London yesterday caused river levels to rise, particularly in the Borehamwood area on Borehamwood Brook. Levels have now mostly fallen back to normal.
Heavy, thundery showers are forecast today, Friday 28 August. It is currently unclear which areas will experience the heaviest rain.
Flooding to low lying land, roads and riverside gardens is possible this morning, from 10AM onwards. Surface water flooding may also affect these areas.
We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We are monitoring rainfall and river levels and are checking rivers for blockages. We will update this message by 3pm today or earlier if the situation changes.
Flood Alert issued on 27 Aug 2020 19:09
River Colne
Heavy rain has fallen today, Thursday 27 August and this has caused rivers and streams to rise today.
The main area of concern is currently Borehamwood where river levels have risen the most. There is likely to be flooding to low lying land and roads close to the river this evening. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We expect the river to remain high this evening.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated tomorrow morning or earlier if the situation changes.
Flood Alert issued on 5 Mar 2020 19:29
River Colne
River levels are rising on the Upper River Colne and Radlett Brook as a result of heavy rainfall throughout today, Thursday 5 March.
Flooding to low lying land, roads and riverside gardens is possible in the Colney Heath, London Colney, Borehamwood, and Radlett areas.
Further rainfall is forecast this evening, and we expect river levels to remain high overnight and into tomorrow morning, Friday 6 March.
We are closely monitoring the situation, our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages.
Please monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated tomorrow morning or as the situation changes.
Flood Alert issued on 29 Feb 2020 11:02
River Colne
Overnight we have seen heavy rainfall around the Upper River Colne and Radlett Brook, which has caused river levels to rise.
Further rainfall is forecast throughout today, Saturday 29th February, so we expect river levels to remain high. Flooding to roads and low lying land is possible today, but flooding to properties is not expected.
We are closely monitoring the situation. Our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages.
Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water and avoid using low lying footpaths near local watercourses.
This message will be updated by 7pm this evening, or as the situation changes.
Flood Alert issued on 28 Feb 2020 17:13
River Colne
River levels are forecast to rise on the Upper River Colne and Radlett Brook as a result of heavy rainfall. Flooding of roads and low lying land is possible this evening, Friday 28th February, if the heaviest rain affects Waterside, Lowbell Lane, London Colney and Warrengate Road. Flooding to properties is not currently expected.
Further rainfall is forecast this evening. We expect river levels to remain high overnight.
We are closely monitoring the situation. Our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages.
Please monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water and avoid using low lying footpaths near local watercourses.
This message will be updated tomorrow morning, Saturday 29 February, or as the situation changes.
Flood Alert issued on 17 Feb 2020 08:10
River Colne
Persistent rain, associated with Storm Dennis, fell over the weekend. The water level within the Upper Colne catchment is still rising. We are expecting scattered showers throughout Monday 17 and Tuesday 18 February.
Flooding to low-lying land, roads and riverside gardens is possible in Colney Heath, London Colney, Borehamwood and Radlett areas on Monday 17 February. Surface water flooding may also affect these areas.
We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We are monitoring rainfall and river levels. We will update this message on Monday evening or earlier if the situation changes.
Flood Alert issued on 16 Feb 2020 19:23
River Colne
We have issued a Flood Alert. Rain associated with Storm Dennis has been falling throughout Sunday 16 February. The storm has had some isolated impacts and further scattered showers are forecast for Sunday night and Monday. It is unclear which areas will see these showers.
If the heaviest rain affects the Colney Heath, London Colney, Borehamwood and Radlett areas, there is the possibility that rivers could overtop their banks. Flooding to low lying land, roads and riverside gardens is possible overnight tonight 16 February. Surface water flooding may also affect these areas.
We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We are monitoring rainfall and river levels. We will update this message on Monday morning or earlier if the situation changes.
Flood Alert issued on 16 Feb 2020 08:11
River Colne
We have issued a Flood Alert. Further rain, associated with Storm Dennis, is forecast to affect the southeast of England throughout most of Sunday 16th February. It is unclear which areas will experience the heaviest rain. Rain should then start to clear from late afternoon today.
Flooding to low lying land and roads close to the river near Colney Heath, London Colney, Borehamwood and Radlett is possible on Sunday. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We are monitoring rainfall and river levels. We will update this message on Sunday evening or earlier if the situation changes.
Flood Alert issued on 15 Feb 2020 21:15
River Colne
We have issued a Flood Alert. Further rain, associated with Storm Dennis, is forecast to affect the southeast of England throughout the weekend. The heaviest rain is predicted overnight Saturday 15 February into Sunday. It is unclear which areas will experience the heaviest rain.
Flooding to low lying land and roads close to the river near Colney Heath, London Colney, Borehamwood and Radlett is possible from tonight. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We are monitoring rainfall and river levels. We will update this message on Sunday morning or earlier if the situation changes.
Flood Alert issued on 15 Feb 2020 15:48
River Colne
We have issued a Flood Alert. Further rain, associated with Storm Dennis, is forecast to affect the southeast of England throughout the weekend. The heaviest rain is predicted overnight Saturday 15 February into Sunday. It is unclear which areas will experience the heaviest rain.
Flooding to low lying land and roads close to the river near Colney Heath, London Colney, Borehamwood and Radlett is possible from tonight. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We are monitoring rainfall and river levels. We will update this message this evening or earlier if the situation changes.
Flood Alert issued on 15 Feb 2020 09:02
River Colne
We have issued a Flood Alert. Further rain, associated with Storm Dennis, is forecast to affect the southeast of England throughout the weekend. The heaviest rain is predicted overnight Saturday 15 February into Sunday. It is unclear which areas will experience the heaviest rain.
Flooding to low lying land and roads close to the river near Colney Heath, London Colney, Borehamwood and Radlett is possible from tonight. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
We are monitoring rainfall and river levels. We will update this message at 4pm today or earlier if the situation changes.
Flood Alert issued on 14 Feb 2020 16:10
River Colne
We have issued a flood alert. Heavy rainfall is expected across much of England overnight on Friday 14 February and continuing throughout the weekend. It is currently unclear which areas will experience the heaviest rain.
Flooding to low lying land and roads close to the river near Colney Heath, London Colney, Borehamwood and Radlett is possible from tonight. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
Please monitor local water levels and weather conditions. Consider putting your flood plan into action and avoid using low lying footpaths near local watercourses.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river. This message will be updated on Saturday morning 15 February or earlier if the situation changes.
Flood Alert issued on 12 Feb 2020 21:29
River Colne
Heavy rainfall is expected overnight on Wednesday 12th and Thursday morning 13th February.
There is likely to be flooding to low lying land and roads close to the river near Colney Heath, London Colney, Borehamwood and Radlett overnight on Wednesday and Thursday morning. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
No flooding to properties is currently expected. Further rainfall is forecast over the weekend.
Please monitor local water levels and weather conditions. Consider putting your flood plan into action and avoid using low lying footpaths near local watercourses.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river. This message will be updated on Thursday morning.
Flood Alert issued on 16 Jan 2020 16:40
River Colne
River levels are forecast to rise on the Upper River Colne and Radlett Brook as a result of heavy rainfall. Flooding of low lying land and roads is expected from 20:00 tonight, Thursday 16 January into Friday morning. The heaviest rain may affect the Park Lane and Colney Heath areas. Flooding to properties is not currently expected.
We are monitoring the situation closely. Our incident response staff are monitoring rainfall and river levels and are checking rivers for blockages.
Please monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated by 10:00 tomorrow morning, Friday 17 January or earlier if the situation changes.
Flood Alert issued on 14 Jan 2020 17:40
River Colne
Throughout today, Tuesday, we have seen prolonged rainfall across the area. This has caused rivers and streams to rise.
The main area of concern is currently the Upper Colne where river levels have risen the most. Further rainfall is forecast overnight through to tomorrow morning, Wednesday. There is likely to be flooding to low lying land and roads close to the river. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We expect the river to remain high, with more rainfall forecast tomorrow, Wednesday. No flooding to properties is currently expected. Avoid walking, cycling or driving through flood water.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated tomorrow morning or earlier if the situation changes.
Flood Alert issued on 22 Dec 2019 08:56
River Colne
River levels remain high on the Upper River Colne and Radlett Brook as a result of heavy rainfall over the weekend. Further rainfall is possible this morning Sunday 22nd December.
River levels are expected to remain with flooding to roads and low lying land likely. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We are continuing to closely monitor rainfall and river levels. Please stay aware of the forecast, local water levels and weather conditions.
Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated this afternoon or earlier if the situation changes.
Flood Alert issued on 21 Dec 2019 18:01
River Colne
River levels remain high on the Upper River Colne and Radlett Brook as a result of heavy rainfall yesterday and today. Some further rainfall is expected overnight into Sunday 22nd December and river levels are expected to remain high.
Flooding to roads and low lying land will remain possible throughout the weekend.
We are continuing to closely monitor rainfall and river levels. Please stay aware of the forecast, local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated in the morning or earlier if the situation changes.
Flood Alert issued on 21 Dec 2019 12:42
River Colne
River levels remain high on the Upper River Colne and Radlett Brook as a result of heavy rainfall yesterday, overnight and into this morning Saturday 21 December.
Some further rainfall is expected this evening and overnight into Sunday and river levels are expected to remain high.
Flooding to roads and low lying land will remain possible throughout the weekend.
We are continuing to closely monitor rainfall and river levels. Please stay aware of the forecast, local water levels and weather conditions.
Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated this evening or earlier if the situation changes.
Flood Alert issued on 21 Dec 2019 00:02
River Colne
River levels remain high on the Upper River Colne and Radlett Brook as a result of heavy rainfall earlier today, 20/12/2019.
Further rainfall is expected overnight and river levels are expected to remain high.
Flooding to roads and low lying land will remain possible into tomorrow morning.
We are continuing to closely monitor rainfall and river levels. Please stay aware of the forecast, local water levels and weather conditions.
Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water.
This message will be updated tomorrow morning, 21/12/2019, or as the situation changes.
Flood Alert issued on 20 Dec 2019 11:32
River Colne
River levels are high and continuing to rise on the Upper Colne as a result of heavy rainfall received over the last few days.
River levels are expected to remain high and flooding to roads and low lying land will continue today, Friday 20 December. Flooding from surface water could also occur. The main areas of concern include Colney Heath and London Colney.
No flooding to properties is forecast, and warnings are not currently expected to be issued.
Take care near the areas of concern, and monitor your local weather conditions.
We are constantly monitoring river levels and have staff on standby to attend any blockages in the river.
This message will be updated at 19:00 today or earlier if the situation changes
Flood Alert issued on 19 Dec 2019 19:12
River Colne
Over the last few days we have seen heavy rainfall. This has meant that the River Colne has been rising.
Whilst river levels are currently steady, further rainfall is expected overnight on Thursday 19 December and it is possible the river may rise further.
There is likely to be flooding to low lying land and roads close to the river. Flooding from surface water, where water gathers and flows off road surfaces, could also occur. No flooding to properties is currently expected.
Please monitor local water levels and weather conditions. Consider putting your flood plan into action and avoid using low lying footpaths near local watercourses.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated by 11.00 on Friday 20 December or earlier if the situation changes.
Flood Alert issued on 19 Dec 2019 10:30
River Colne
Over the last 24 hours we have seen heavy rainfall. This has meant that the River Colne has been rising.
Whilst river levels are currently steady, further rainfall is expected over the next 24 to 48 hours and it is possible the river may rise further.
There is likely to be flooding to low lying land and roads close to the river. Flooding from surface water, where water gathers and flows off road surfaces, could also occur. No flooding to properties is currently expected.
Please monitor local water levels and weather conditions. Consider putting your flood plan into action and avoid using low lying footpaths near local watercourses.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated by 20.00 on Thursday 19 December or earlier if the situation changes.
Flood Alert issued on 18 Dec 2019 20:25
River Colne
Heavy rainfall is expected this evening and overnight on Wednesday 18 December.
There is likely to be flooding to low lying land and roads close to the river overnight on Wednesday. Flooding from surface water, where water gathers and flows off road surfaces, could also occur.
We expect the river to remain high overnight and into Thursday morning. No flooding to properties is currently expected. Further rainfall is forecast for the remainder of the week.
Please monitor local water levels and weather conditions. Consider putting your flood plan into action and avoid using low lying footpaths near local watercourses.
We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.
This message will be updated by 11.00 on Thursday 19 December or earlier if the situation changes.