Click on a flood area name to view live flood alerts and warnings and historical flood information.
Woolgrove Road, Green Lane, Purwell Lane, Brook View, Ninesprings Way and Oakfield Avenue in Hitchin, Stevenage Road in Ashbrook, Stevenage Road, Priory Lane and Elms Close in Little Wymondley, High Street and Church Lane in Graveley
The Dane End tributary at Dane End including Sacombe
Areas at risk of groundwater flooding around Flamstead, including Trowley Bottom and Lower Sawpit Wood
Areas at risk of groundwater flooding in Kimpton and Lilley Bottom, including Lye Hill, Whiteway and Claggy Bottom
The Lower Lee tributaries, including the Nazeing Brook, Ching Brook, Cobbins Brook, Pymmes Brook, Rags Brook, Salmons Brook, Turkey Brook, Trinity Marsh Ditch and the Small River Lee
The Lower River Colne and Frays River at Uxbridge, West Drayton, Poyle and Stanwell Moor
The Lower River Lee at Hoddesdon and Cheshunt including Broxbourne and Waltham Abbey
The Lower River Lee from Hoddesdon to Canning Town including, Cheshunt, Enfield, Edmonton, Tottenham, Walthamstow, Hackney, Stratford and West Ham
The Middle River Colne at Watford and Rickmansworth including Carpenders Park
The Mimmshall Brook at Warrengate Road including South Mimms, Potters Bar, Brookmans Park and Welham Green
The Mimmshall Brook at Warrengate Road including Water End
The Radlett and Borehamwood Brooks at Borehamwood
The Radlett Brook at Radlett
The Rags Brook at Flamstead End to Cheshunt
The River Ash at Furneux Pelham including Clapgate
The River Ash at Little Hadham, Hadham Ford, Much Hadham, Widford and Wareside
The River Ash in Hertfordshire including Furneux Pelham, Little Hadham, Much Hadham and Wareside
The River Beane at Hertford
The River Beane at Walkern including Holbrook
The River Beane at Watton-at-Stone to Waterford including Stapleford
The River Beane catchment including the Stevenage Brook and the Dane End Tributary
The River Bulbourne at Boxmoor, Hemel Hempstead
The River Chess at Chenies, including Latimer and Sarratt
The River Chess at Loudwater, Rickmansworth
The River Chess at Chesham, Chenies and Loudwater
The River Colne at Colney Heath including North Mymms
The River Colne at London Colney including Colney Street and Broad Colney
The River Colne at Rickmansworth including Batchworth, Money Hill and Maple Cross
The River Colne at Watford including Bushey
The River Colne at Willowbank including Uxbridge Moor
The River Gade at Frogmore End including Apsley and Bennets End, Hemel Hempstead
The River Gade at Hemel Hempstead
The River Gade at Kings Langley and Croxley, including Abbots Langley
River Ivel from Langford to Blunham, including the rivers Purwell, Hiz, Flit and Hit
River Lee at Harpenden and Wheathampstead including East Hyde
River Lee at Hertford including Lemsford, Hatfield, Ware and Stanstead Abbotts
River Lee at Hertford and Ware including Stanstead Abbotts
River Lee at Luton, Harpenden including Wheathampstead and East Hyde
River Lee from Lemsford to Hertford including Welwyn Garden City, Hatfield and Mill Green
The River Mimram at Welwyn including Welwyn Garden City and Digswell
The River Mimram at Whitwell including Codicote
The River Mimram from Tewin to Hertford including Hertingfordbury
The River Mimram at Whitwell, Welwyn, Tewin, Hertingfordbury and Hertford
The River Quin at Braughing
River Rhee from Guilden Morden to Haslingfield
The River Rib at Buntingford to Barwick including Standon
The River Rib at Wadesmill to Hertford
The River Stort, Stansted Brook and their tributaries from Clavering to Hoddesdon including Stanstead Mountfitchet, Bishops Stortford, Sawbridgeworth and Harlow
The River Stort at Bishops Stortford including Spellbrook
The River Stort at Clavering and Manuden
The River Stort at Harlow including Roydon
The River Stort at Sawbridgeworth
River Thame from Long Marston to Eythrope including Rowsham and North Aylesbury
River Thame from Marsworth to Dorchester including, Long Marston, Rowsham, North Aylesbury, Cuddington, Thame, Ickford, Wheatley, Drayton St Leonard, Overy, the Horsenden Stream at Princes Risborough and the Chalgrove Brook at Chalgrove and Stadhampton
The River Ver at Markyate including Flamstead, Harpenden
The River Ver at Redbourn including Redbournbury
The River Ver at St Albans including Sopwell, Park Street and Frogmore
The River Ver at Markyate, Redbourn and St. Albans
The River Gade and Bulbourne at Boxmoor, Hemel Hempstead, Frogmore End, Kings Langley and Croxley
The Rivers Rib and Quin at Chipping, Buntingford, Braughing, Standon, Barwick, Wadesmill and Hertford
The Small River Lee at Cheshunt including, Turnford, Holdbrook and Enfield Lock
The Stevenage Brook at Stevenage including Hooks Cross
Trinity Marsh Ditch at Waltham Cross
The Upper River Colne and Radlett Brook at Colney Heath, London Colney, Borehamwood and Radlett