Environment AgencyThames
Flood areas in Thames
Thames has 204 flood areas with at least one alert or warning since 2006; River Cole, Dorcan Brook and South Marston Brook has had the most (163).
Flood areas in Thames with ten or more alerts and warnings
- River Cole, Dorcan Brook and South Marston Brook163 since 2008
- Upper River Wey119 since 2012
- River Blackwater and The Cove Brook101 since 2011
- Cranleigh Waters99 since 2012
- River Thames at Trowlock Island99 since 2013
- River Evenlode from Moreton in Marsh to Cassington and also the River Glyme at Wootton and Woodstock91 since 2008
- River Thame, Horsenden Stream and Chalgrove Brook91 since 2008
- Lower River Loddon79 since 2011
- Chertsey Bourne72 since 2012
- River Ock from Watchfield to Abingdon, and also the Letcombe Brook at Wantage, Grove and East Hanney68 since 2008
- Tributaries on the Upper River Thames above Cricklade68 since 2010
- Langford and Wendlebury Brooks from Stratton Audley down to near Merton68 since 2011
- Emm Brook and Queen's Brook68 since 2011
- Hoe Stream68 since 2012
- River Cherwell from Lower Heyford down to and including Oxford65 since 2012
- River Thames from Hampton and Thames Ditton to Teddington65 since 2012
- Lower River Loddon at the River Thames confluence at Twyford61 since 2011
- River Ray and its tributaries from Shipton Lee to and including Islip60 since 2011
- River Pang from East Ilsley to Pangbourne and Sulham Brook59 since 2011
- River Thames and tributaries from Buscot Wick down to Kings Lock57 since 2008
- River Dikler from Condicote to Little Rissington57 since 2008
- River Thames and tributaries in the Oxford area52 since 2008
- River Thames and its small tributaries from Calcutt to Lechlade51 since 2011
- Bear Brook and tributaries in the Aylesbury area, including Wendover and Weston Turville49 since 2009
- Sor Brook and The Bloxham Brook and their tributaries49 since 2012
- Cut48 since 2012
- Ginge Brook46 since 2009
- Upper River Loddon46 since 2012
- River Thames from Shepperton to Molesey46 since 2012
- River Thames for the Abingdon area43 since 2008
- River Ray and Swinbourne for West Swindon area to above Water Eaton43 since 2011
- River Cherwell from Charwelton to just above Upper Heyford42 since 2012
- River Thames at Thames Ditton Island41 since 2013
- Clanfield Brook for Clanfield Village and the Shill Brook for Bampton40 since 2009
- River Thames from Hurley to Cookham40 since 2012
- River Thames for Henley, Remenham, Medmenham and its tributaries38 since 2011
- River Thames and its tributaries from Days Lock to above Pangbourne38 since 2012
- River Thames for Shiplake, Lower Shiplake and Wargrave37 since 2012
- River Thames from Pangbourne to Purley36 since 2008
- Windle Brook and Hale, Mill and Addlestone Bournes36 since 2013
- River Thames from Mapledurham to Sonning35 since 2009
- River Enborne and Foudry Brook32 since 2011
- River Kennet from Thatcham down to Reading32 since 2012
- River Windrush from Bourton to Newbridge30 since 2009
- River Kennet and its tributaries from Berwick Bassett down to Newbury27 since 2012
- River Thames from Datchet to Shepperton Green26 since 2012
- River Churn and its tributaries26 since 2012
- River Leach from Northleach to Mill Lane near Lechlade25 since 2012
- Lower River Wey25 since 2013
- Tillingbourne25 since 2013
- River Coln and its tributaries23 since 2012
- River Whitewater and River Hart23 since 2013
- River Wey at Elstead and Eashing18 since 2013
- River Thames at Purley Village17 since 2009
- River Thames for Shiplake, Lower Shiplake and Wargrave17 since 2012
- River Thames at Thames Ditton Island14 since 2012
- River Lambourn and its tributaries from Upper Lambourn down to Newbury14 since 2012
- River Thames at Trowlock Island13 since 2012
- River Thames from Buscot Wick down to Shifford12 since 2012
- River Thame at Dorchester12 since 2012
- River Ray for Islip12 since 2019
- River Loddon at Twyford, Charvil and Wargrave11 since 2012
- Groundwater flooding in the Upper Og Valley11 since 2012
- River Wye and The Hughenden Stream11 since 2014
- Properties closest to the River Kennet at the Burghfield, Southcote, Coley and Holybrook areas11 since 2014
- River Thames between Newbridge and Kings Lock above Oxford10 since 2012
- River Thames for Henley, Remenham, and Medmenham10 since 2012
Thames has 137 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.