Flood Alert Info - Tributaries on the Upper River Thames above Cricklade

Area Description

Flagham Brook, The Swill Brook, The Hankerton Brook, The Hykemeres Stream, The Derry Brook and The River Key.

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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Flood Alert Currently in Force

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:
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Historical Flood Alert Messages for this Area


Flood Alert issued on 29 May 2018 18:41
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. The forecast is for thundery showers, which could be heavy at times, developing in the evening and overnight. There is uncertainty over the amount of rainfall expected and location of any of these showers. If we receive this forecast rainfall water levels on the Upper Thames tributaries will be expected to rise quickly in response. Flooding of low lying land and roads would be expected. We are constantly monitoring river levels and our staff are out in the area checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to the River and Sea levels in England webpage for current levels. This message will be updated tomorrow morning (30/5/2018)


Flood Alert issued on 29 May 2018 09:52
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. The forecast is for a largely dry day with a chance of thundery showers, which could be heavy at times, developing in the late afternoon and through the evening. There is uncertainty over the amount of rainfall expected and location of any of these showers. If we receive this forecast rainfall water levels on the Upper Thames tributaries will be expected to rise quickly in response. Flooding of low lying land and roads would be expected. We are constantly monitoring river levels and our staff are out in the area checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to the River and Sea levels in England webpage for current levels. This message will be updated this evening (29/5/2018).


Flood Alert issued on 28 May 2018 18:33
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. The forecast is for a chance of thundery showers, which could be heavy at times, overnight. There is uncertainty over the amount of rainfall expected and location of any of these showers. If we receive this forecast rainfall water levels on the Upper Thames tributaries will be expected to rise quickly in response. Flooding of low lying land and roads would be expected. We are constantly monitoring river levels and our staff are out in the area checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to the River and Sea levels in England webpage for current levels. This message will be updated tomorrow morning (29/5/2018).


Flood Alert issued on 28 May 2018 10:15
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. The forecast is for a largely dry day with a chance of thundery showers, which could be heavy at times, through the afternoon. There is uncertainty over the amount of rainfall expected and location of any of these showers. If we receive this forecast rainfall water levels on the Upper Thames tributaries will be expected to rise quickly in response. Flooding of low lying land and roads would be expected. We are constantly monitoring river levels and our staff are out in the area checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to the River and Sea levels in England webpage for current levels. This message will be updated this evening (28/5/2018).


Flood Alert issued on 27 May 2018 17:44
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. The forecast is for heavy showers through Sunday evening and overnight however the rainfall amount and location is uncertain. If we receive this forecast rainfall water levels on the Upper Thames tributaries will be expected to rise quickly in response. Flooding of low lying land and roads would be expected. We are constantly monitoring river levels and our staff are out in the area checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to the River and Sea levels in England webpage for current levels. This message will be updated tomorrow morning (28/5/2018).


Flood Alert issued on 27 May 2018 10:41
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. The forecast is for heavy showers through Sunday afternoon and overnight however the rainfall amount and location is uncertain. If we receive this forecast rainfall water levels on the Upper Thames tributaries will be expected to rise quickly in response. Flooding of low lying land and roads would be expected. We are constantly monitoring river levels and our staff are out in the area checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to the River and Sea levels in England webpage for current levels. This message will be updated this evening (27/5/2018).


Flood Alert issued on 26 May 2018 20:15
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Heavy showers are forecast overnight and through tomorrow, however the rainfall amount and location is uncertain. If we receive this forecast rainfall water levels on the Upper Thames tributaries will be expected to rise quickly in response. Flooding of low lying land and roads would be expected. We are constantly monitoring river levels and our staff are out in the area checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to the River and Sea levels in England webpage for current levels. This message will be updated tomorrow morning (27/5/2018).


Flood Alert issued on 3 Apr 2018 18:08
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook remain high but are continuing to fall slowly. Flooding of low lying land and roads is expected to continue in the Oaksey area overnight but no property flooding is expected. River levels on the River Key and other rivers in the area have returned to normal. Some showers are possible overnight tonight with widespread showers and some longer periods of rain forecast on Wednesday. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning (04/04/2018).


Flood Alert issued on 3 Apr 2018 11:19
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook are now falling slowly. River levels of the River Key have fallen. Some light showers are possible this morning but Tuesday will be a mostly dry day. Flooding of low lying land and roads is expected to continue in the Oaksey area but no property flooding is expected. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated this evening (03/04/2018).


Flood Alert issued on 2 Apr 2018 20:11
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook and River Key are now falling. Some further showers are possible this evening and these may turn heavy in places overnight. Flooding of low lying land and roads is expected to continue in the Oaksey and Purton Stoke areas but no property flooding is expected. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning (03/04/2018).


Flood Alert issued on 2 Apr 2018 10:43
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook and River Key are rising in response to the overnight rainfall. Some light rain is expected this morning with further showers also possible this afternoon. These showers may turn heavy in places this evening and overnight. Flooding of low lying land and roads is expected to continue in the Oaksey area and is possible in the Purton Stoke area later on today but no property flooding is expected. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated this afternoon (02/04/2018).


Flood Alert issued on 1 Apr 2018 19:43
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook are continuing to fall slowly. Persistent rain is expected overnight tonight, with further showers and light rain possible on Monday. Flooding of low lying land and roads is expected to continue in the Oaksey area and the river may rise again overnight and on Monday but no property flooding is expected. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning (02/04/2018).


Flood Alert issued on 1 Apr 2018 10:43
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook have been falling slowly overnight. Sunday is forecast to be a mostly dry day with further rainfall overnight into Monday. Flooding of low lying land and roads is expected to continue in the Oaksey area and the river may rise again overnight and on Monday but no property flooding is expected. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated this evening.


Flood Alert issued on 31 Mar 2018 20:17
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook have been high and steady throughout the day following recent rainfall. Any rainfall is now clearing to the east and it should be a largely dry night and into tomorrow morning (01/04/18). However, river levels remain high in places and any flooding of low lying land and roads is expected to continue, especially in the Oaksey area. We are constantly monitoring river levels. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning if not before.


Flood Alert issued on 31 Mar 2018 10:56
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook are stabilising, but remain high in response to recent rainfall. Further showers, sometimes heavy in places, are expected across the area today (31/03/18), gradually easing through the day. Therefore levels are expected to continue to remain high today and flooding of low lying land and roads is expected to continue, especially in the Oaksey area. We are constantly monitoring river levels. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated later today if not before.


Flood Alert issued on 30 Mar 2018 19:12
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook have remained high throughout the day in response to today's (30/03/18) rainfall. Rainfall will continue through this evening and overnight into Saturday morning, with heavy showers possible at times. Further showers are expected during Satuday daytime. Therefore levels are expected to continue to rise tonight and flooding of low lying land and roads is possible tonight, especially in the Oaksey area. We are constantly monitoring river levels. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated by the end of tomorrow morning if not before.


Flood Alert issued on 23 Jan 2018 11:09
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Upper River Thames Tributaries remain high after Sunday's rainfall. Showery rain is forecasted this morning but these should become lighter this afternoon and clear this evening. River levels have been decreasing, and further flooding of low lying land and roads is not expected to continue. We are constantly monitoring river levels. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated this evening or before if the situation changes.


Flood Alert issued on 22 Jan 2018 19:00
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Upper River Thames Tributaries remain high after Sunday's rainfall. There are rain showers forecasted Tuesday morning giving way to a mostly dry day with some scattered showers. River levels have started to decrease, and further flooding of low lying land and roads is not expected to continue. We are constantly monitoring river levels. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning or before if the situation changes.


Flood Alert issued on 22 Jan 2018 10:13
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Upper River Thames Tributaries have continued rising during the night after yesterday's rainfall. There is no rain forecast today however we will see showers in the early hours of Tuesday. River levels are expected to continue to rise this morning and then stabilise later today, flooding of low lying land and roads is expected to continue. We are constantly monitoring river levels. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated this evening or before if the situation changes.


Flood Alert issued on 21 Jan 2018 22:05
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Upper Thames Tributaries have been rising steadily throughout the day today (21/01/2018) in response to recent rainfall. The rain has now cleared away leaving a dry night. Levels are expected to continue to rise tonight and flooding of low lying land and roads is expected overnight, especially along the Swill Brook and the River Key. We are constantly monitoring river levels. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning


Flood Alert issued on 5 Jan 2018 09:14
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook are falling steadily in the Oaksey area. The weather forecast is for a mostly dry day on Friday. Water levels on the river are expected to continue falling on Friday (05/01/2018). Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated on Friday evening before 20:00 hours.


Flood Alert issued on 4 Jan 2018 19:07
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook are continuing to fall in the Oaksey area. A further band of broken showers is forecast late tonight which will clear to leave a mostly dry day on Friday. However the river is expected to continue to fall on Friday (05/01/2018). Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated on Friday morning.


Flood Alert issued on 4 Jan 2018 10:02
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook have now fallen in the Oaksey area. Some further showers are possible on Thursday and another band of rain is forecast overnight into Friday. However the river is expected to continue to fall during Thursday (04/01/2018). Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated on Thursday evening before 20:00 hours.


Flood Alert issued on 3 Jan 2018 19:04
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Swill Brook are now stable. Some further rain is forecast overnight into Thursday. Therefore flooding of low lying land and roads is expected to continue overnight (03/01/2018), especially in the Oaksey area. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated on Thursday morning.


Flood Alert issued on 3 Jan 2018 11:55
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the River Thames have been rising slowly throughout the morning. Some further blustery showers may occur on Wednesday with further rain forecast overnight and on Thursday. Therefore levels are expected to continue to rise today and flooding of low lying land and roads is expected later on this afternoon or this evening (03/01/2018), especially in the Oaksey area. Our staff have been out in the area checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated by 20:00hrs evening.


Flood Alert issued on 30 Dec 2017 11:03
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. River levels on the Upper Thames Tributaries are expected to continue to decline. There is rain forecast for late afternoon (30/12/2017) and overnight, some of which could be heavy. Although levels are falling, they remain sensitive to further rainfall, however further flooding of low lying land and roads is not expected. We are monitoring river levels and our staff will be out in the area today checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated this evening.


Flood Alert issued on 29 Dec 2017 19:30
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. River levels on the Upper Thames Tributaries have slowly been dropping during the day but remain high on the Swill Brook, levels are expected to continue to decline tonight. There is rain forecast for late tonight and the early hours of tomorrow morning (30/12/2017) this should then clear away until the evening. Although levels are falling, they remain high and will increase again slightly due to tonight's rain however further flooding of low lying land and roads is expected to be minimal. We are monitoring river levels and our staff have been out in the area today checking for and clearing blockages, they will be doing the same tomorrow. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning.


Flood Alert issued on 29 Dec 2017 18:54
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. River levels on the Upper Thames Tributaries have slowly been dropping during the day but remain high on the Swill Brook, levels are expected to continue to decline tonight. There is rain forecast for late tonight and the early hours of tomorrow morning (30/12/2018) this should then clear away until the evening. Although levels are falling, they remain high and will increase again slightly due to tonight's rain however further flooding of low lying land and roads is expected to be minimal. We are monitoring river levels and our staff have been out in the area today checking for and clearing blockages, they will be doing the same tomorrow. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning.


Flood Alert issued on 29 Dec 2017 10:27
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. River levels on the Upper Thames Tributaries have slowly been dropping during last night. Levels are expected to continue to decline tonight. There has been heavy rain early this morning (29/12/2017) which might be followed by some lighter showers through the morning, we will see a dryer afternoon but there is more rain forecast this evening. Although levels are falling, they remain high and will increase again slightly due to the this mornings rain however further flooding of low lying land and roads is expected to be minimal. We are monitoring river levels and our staff will be out in the area today checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated this evening.


Flood Alert issued on 28 Dec 2017 18:55
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. River levels on the Upper Thames Tributaries have remained high today (28/12/2017) especially along the River Key and Swill Brook. Levels are expected to continue to decline tonight. There is no rain forecast today but we will see some fast moving heavy showers Friday morning. Although levels are falling, they will remain high through the night and are sensitive to the forecasted rainfall and further flooding of low lying land and roads is expected to be minimal. We are constantly monitoring river levels and our staff were out in the area today checking for and clearing blockages and will be again tomorrow. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning.


Flood Alert issued on 28 Dec 2017 10:40
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. River levels on the Upper Thames Tributaries remained high during last night especially along the River Key and Swill Brook. Levels are expected to continue to decline during the day today (28/12/2017). There is no rain forecast today but we will see some fast moving heavy showers Friday morning. Although levels are falling, they are expected to remain high throughout the day. We are constantly monitoring river levels and our staff are out in the area today checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated this evening.


Flood Alert issued on 27 Dec 2017 18:05
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Upper Thames Tributaries have risen slowly through the day in response to recent rainfall. There is no rainfall forecast for the next 24 hour period. Levels are expected to remain high through this evening flooding of low lying land and roads is expected to continue, especially along the Swill Brook and River Key. River levels should start to lower during the night. We are constantly monitoring river levels and our staff were out in the area today (27/12/2017) checking for and clearing blockages and will be doing the same tomorrow. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning.


Flood Alert issued on 27 Dec 2017 10:13
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Upper Thames Tributaries have risen slowly throughout the night in response to recent rainfall. The rain should clear away this morning (27/12/2017) leading to a dry day and night. Levels are expected to remain high through the day and flooding of low lying land and roads is expected to continue, especially along the Swill Brook and River Key. We are constantly monitoring river levels and our staff are out in the area checking for and clearing blockages. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels . This message will be updated this evening.


Flood Alert issued on 26 Dec 2017 22:12
Flagham Brook, Swill Brook, Hankerton Brook, Hykemeres Stream, Derry Brook, River Key
Property flooding is not currently expected. Levels on the Upper Thames Tributaries have been rising steadily throughout the evening in response to recent rainfall (26/12/2017) especially on the Swill Brook. There is rainfall forecast throughout the night then giving way to a dry day tomorrow. Therefore levels are expected to continue to rise overnight and flooding of low lying land and roads is expected. We are constantly monitoring river levels and our staff have been out in the area checking for and clearing blockages earlier today. Remain safe and be aware of your local surroundings, flood waters may be deep and fast flowing. Please refer to river levels on the internet for current river levels. This message will be updated tomorrow morning.