Environment AgencyHerts and North London
Flood areas in Herts and North London
Herts and North London has 81 flood areas with at least one alert or warning since 2006; Upper River Colne and Radlett Brook has had the most (116).
Flood areas in Herts and North London with ten or more alerts and warnings
- Upper River Colne and Radlett Brook116 since 2009
- Lower Lee tributaries102 since 2008
- River Pinn and Woodridings Stream85 since 2008
- Middle River Roding83 since 2010
- Silk Stream and the Deans, Edgware, Dollis, Mutton, Wembley and Wealdstone Brooks72 since 2008
- Tidal River Crane62 since 2009
- Yeading Brooks in London Boroughs of Harrow and Hillingdon55 since 2008
- Rivers Beam and Rom45 since 2016
- River Stort and Stansted Brook catchment42 since 2009
- Upper Roding37 since 2011
- Lower River Colne and Frays River36 since 2009
- River Lee at Hertford34 since 2009
- Cripsey Brook in Epping Forest District Council34 since 2011
- Colne Brook at Iver and Colnbrook28 since 2009
- River Ash in Hertfordshire27 since 2011
- River Ingrebourne at Harold Park and Hornchurch27 since 2012
- River Brent from Hendon to Brentford23 since 2009
- Fluvial River Crane19 since 2008
- Lower River Lee from Hoddesdon to Canning Town16 since 2009
- River Lee at Luton, Harpenden and Wheathampstead16 since 2009
- Middle River Colne15 since 2009
- River Beane catchment14 since 2010
- Lower River Roding14 since 2011
- Rivers Gade and Bulbourne11 since 2016
- Colne Brook at Colnbrook10 since 2014
Herts and North London has 56 more flood areas with fewer than ten alerts and warnings since 2006.
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.