Flood Warning & Alert Types

 
ImageLevelNameMeaning
1Severe Flood WarningSevere Flooding, Danger to Life.
2Flood WarningFlooding is Expected, Immediate Action Required.
3Flood AlertFlooding is Possible, Be Prepared.
4Warning no Longer in ForceThe warning is no longer in force
*Sources updated daily from the Environment Agency's API: https://environment.data.gov.uk/flood-monitoring/id/floods.

Flood level warnings are categorised in severity by a numbering system as shown in the table above. The highest type of flood alert is 1, whereas the lowest type of flood notice is 4.

Flood Alerts, Warnings & Notices - 24 Feb, 2026

3


Gloucestershire, South Gloucestershire, Wiltshire Upper Bristol Avon area

4


Lincolnshire, Nottinghamshire River Trent from Cromwell Weir to Gainsborough

3


Derbyshire, Leicestershire, Nottinghamshire Lower River Soar in Leicestershire

3


Gloucestershire, Wiltshire River Churn and its tributaries

3


Oxfordshire River Cherwell from Lower Heyford down to and including Oxford

3


Gloucestershire, Oxfordshire River Windrush from Bourton to Newbridge

3


Gloucestershire, Oxfordshire, Warwickshire River Evenlode from Moreton in Marsh to Cassington and also the River Glyme at Wootton and Woodstock

3


Oxfordshire River Thames for the Abingdon area

3


Oxfordshire Ginge Brook

4


Cambridgeshire, Peterborough North Bank Road alongside the River Nene, east of Peterborough and west of Dog-in-a-Doublet Sluice

4


Oxfordshire River Ray for Islip

3


Buckinghamshire, Oxfordshire River Ray and its tributaries from Shipton Lee to and including Islip

3


Gloucestershire, Oxfordshire, Swindon, Wiltshire River Thames and its small tributaries from Calcutt to Lechlade

3


Buckinghamshire, Hertfordshire, Oxfordshire River Thame, Horsenden Stream and Chalgrove Brook

3


Bournemouth, Christchurch and Poole, Dorset Council, Hampshire Lower Avon and tributaries

3


Cambridgeshire, Norfolk Hundred Foot Washes in Cambridgeshire and Norfolk

4


Buckinghamshire, Greater London, Hertfordshire, Hillingdon, Slough, Surrey, Windsor and Maidenhead Lower River Colne and Frays River

3


Shropshire, Staffordshire, Telford and Wrekin Tern and Perry catchments

3


Gloucestershire River Dikler from Condicote to Little Rissington

3


Gloucestershire, Oxfordshire River Leach from Northleach to Mill Lane near Lechlade

3


Bracknell Forest, Surrey, Windsor and Maidenhead Chertsey Bourne

2


Cambridgeshire, Peterborough B1040 Thorney to Whittlesey Road to the South of the River Nene

4


Buckinghamshire, Oxfordshire River Ray from the Heath Bridge area to and including the Otmoor Basin

4


Cambridgeshire River Great Ouse in Cambridgeshire from Brampton to Earith

3


Dorset Council Lower Frome and tributaries

3


Herefordshire River Lugg south of Leominster

3


Norfolk The tidal Rivers Bure, Ant and Thurne

3


Somerset River Yeo and River Parrett Moors around Muchelney and Thorney

3


Bath and North East Somerset, Wiltshire Mid Bristol Avon area

4


Somerset East Somerset Rivers

3


Oxfordshire River Ock from Watchfield to Abingdon, and also the Letcombe Brook at Wantage, Grove and East Hanney

3


Gloucestershire, Worcestershire River Severn in Gloucestershire

3


Oxfordshire, West Berkshire River Pang from East Ilsley to Pangbourne and Sulham Brook

3


Gloucestershire, Warwickshire, Worcestershire River Avon in Worcestershire

3


Gloucestershire, Oxfordshire River Thames and tributaries from Buscot Wick down to Kings Lock

3


East Riding of Yorkshire, North Yorkshire, York Lower River Derwent

3


Oxfordshire River Thames and tributaries in the Oxford area

3


East Riding of Yorkshire, North Yorkshire Upper River Derwent

4


Somerset West Somerset Streams

4


Greater London, Hammersmith and Fulham, Hounslow, Richmond upon Thames, Wandsworth Tidal Thames riverside from Putney Bridge to Teddington Weir

3


Shropshire Severn Vyrnwy confluence

3


Greater London, Richmond upon Thames River Thames at Trowlock Island

4


Greater London, Kingston upon Thames, Richmond upon Thames, Surrey River Thames from Hampton and Thames Ditton to Teddington

3


Somerset Lower Tone and Parrett Moors

4


Gloucestershire, Shropshire, Worcestershire River Severn in Worcestershire

4


Worcestershire Kempsey Village

3


Derby, Derbyshire, Leicestershire River Trent in Derbyshire

4


Shropshire, Telford and Wrekin, Worcestershire River Severn in Shropshire

4


Gloucestershire, Worcestershire River Severn at Severn Ham, Tewkesbury

4


Gloucestershire River Severn at Apperley and The Leigh

3


Dorset Council Groundwater flooding in the West of Dorset

3


Dorset Council, Hampshire, Wiltshire Groundwater flooding in the Cranborne Chase area

3


Dorset Council Weymouth Rivers and Streams

3


Hampshire, Wiltshire River Bourne and tributaries

3


Wiltshire River Wylye and tributaries

3


Dorset Council River Piddle and tributaries

3


Reading, West Berkshire, Wokingham River Kennet from Thatcham down to Reading

3


Oxfordshire, Wokingham Lower River Loddon at the River Thames confluence at Twyford

3


Swindon, West Berkshire, Wiltshire River Kennet and its tributaries from Berwick Bassett down to Newbury

3


West Berkshire River Lambourn and its tributaries from Upper Lambourn down to Newbury

2


Wiltshire Middle Hampshire Avon at Britford, Salisbury

2


Dorset Council, Hampshire, Wiltshire Middle Hampshire Avon from Salisbury to Ringwood

2


Somerset Curry Moor and Hay Moor

3


Oxfordshire, Wokingham River Thames for Shiplake, Lower Shiplake and Wargrave

3


Oxfordshire, Reading, West Berkshire, Wokingham River Thames from Mapledurham to Sonning

3


Oxfordshire, West Berkshire River Thames from Pangbourne to Purley

3


Oxfordshire, West Berkshire River Thames and its tributaries from Days Lock to above Pangbourne

3


Buckinghamshire, Windsor and Maidenhead River Thames from Hurley to Cookham

3


Buckinghamshire, Oxfordshire, Windsor and Maidenhead, Wokingham River Thames for Henley, Remenham, Medmenham and its tributaries

3


Greater London, Richmond upon Thames, Surrey River Thames from Shepperton to Molesey

3


West Sussex Aldingbourne and Barnham Rifes

3


Slough, Surrey, Windsor and Maidenhead River Thames from Datchet to Shepperton Green

3


Dorset Council, Hampshire, Wiltshire Middle Hampshire Avon and tributaries

3


Isle of Wight Eastern Yar

4


Oxfordshire, Wokingham River Thames for Shiplake, Lower Shiplake and Wargrave

4


Greater London, Richmond upon Thames, Surrey River Thames at Thames Ditton Island

2


Dorset Council Groundwater flooding for the Iwerne

3


Hampshire, Wiltshire Groundwater flooding in the Salisbury Plain area

2


Wiltshire Groundwater flooding in the South Wiltshire Downs - The Dene

3


Gloucestershire River Coln and its tributaries

3


West Berkshire Groundwater flooding in the Great Shefford area

3


Oxfordshire, West Berkshire Groundwater flooding in the Lambourn Valley catchment

3


Hampshire Groundwater flooding in the Candovers and Old Alresford

3


Lincolnshire Minor Watercourses from Heighington to Dunston

3


Hampshire Groundwater flooding in Hursley

3


Hampshire, Wiltshire Groundwater flooding in villages surrounding Andover

3


Hampshire Groundwater flooding in Deane and Ashe in North Hampshire

2


Wiltshire Groundwater flooding for the Till

2


Wiltshire Groundwater flooding in the Chitterne Valley

2


Wiltshire Groundwater flooding for the Wylye Valley

2


Wiltshire Groundwater flooding for the Wylye Valley at Warminster

3


Hampshire, Wiltshire Groundwater flooding in Pitton, West Tytherley, Nether Wallop and Broughton

2


Hampshire, Wiltshire Groundwater flooding in the Bourne Valley - The Winterbournes

3


Hampshire Groundwater flooding in Bramdean and Cheriton

3


Hampshire Groundwater flooding in Twyford and Hensting

3


Hampshire Groundwater flooding in Vernham Dean, Upton and the Bourne Valley

3


Swindon, Wiltshire Groundwater flooding in the Upper Og Valley

4


Bedford, Milton Keynes River Great Ouse from Newport Pagnell to Sharnbrook

4


Dorset Council, Somerset River Yeo and Parrett, Upper Reaches

3


Somerset River Yeo and Parrett, Yeovilton to Huish Episcopi

3


Somerset River Yeo and Parrett, The Levels

3


Somerset River Yeo and Parrett, Bridgwater to the Coast

3


Hampshire Upper Meon

4


Bedford, Central Bedfordshire, Milton Keynes River Great Ouse from Sharnbrook to Roxton

2


Dorset Council Groundwater flooding in the Cerne Valley

2


Dorset Council Groundwater flooding for the Hooke

2


Dorset Council Groundwater flooding for the Sydling

2


Dorset Council Groundwater flooding for the South Winterbourne Valley

2


Dorset Council Groundwater flooding for the Pimperne Brook

2


Somerset A361 East Lyng to Burrowbridge

2


Dorset Council Groundwater flooding for the Piddle Valley

2


Wiltshire Groundwater flooding for the Ebble Valley

2


Dorset Council Groundwater flooding for the Devils Brook

4


Somerset River Parrett (lower) at Langport Westover Trading Estate

2


Dorset Council Groundwater flooding for the North Winterborne, north of the A354

3


Hampshire Groundwater flooding in the Meon Valley from East Meon to Soberton

3


Hampshire Groundwater flooding in Hambledon

3


Hampshire, West Sussex Lower River Ems

2


Dorset Council Groundwater flooding for the North Winterborne, south of the A354

2


Dorset Council Groundwater flooding for the Bere Stream

2


Wiltshire Groundwater flooding in the South Wiltshire Downs - The Chilmark

2


Wiltshire Groundwater flooding in the South Wiltshire Downs - The Teffont

2


Somerset River Yeo and River Parrett Moors, low lying properties around Muchelney

2


Somerset Salt Moor and North Moor including Moorland

3


East Sussex Groundwater flooding in Denton

3


West Sussex Groundwater flooding in upper River Ems Valley

3


West Sussex Groundwater flooding in West Dean, Singleton, Charlton, East Dean and Chilgrove

2


Dorset Council Groundwater flooding in the Allen Vale at Monkton Up Wimborne and Wimborne St Giles

2


Dorset Council, Wiltshire Groundwater flooding in the Allen Vale at Sixpenny Handley

2


Dorset Council Groundwater flooding for the Bere Stream at Bere Regis

2


Dorset Council Groundwater flooding for the Crichel

2


Dorset Council, Hampshire Groundwater flooding for the Crane

2


Hampshire Groundwater flooding in the Cranborne Chase in West Hampshire - Damerham and Martin

2


Dorset Council, Wiltshire Groundwater flooding for the Gussage

2


Dorset Council, Wiltshire Groundwater flooding for the Tarrant Valley

2


Hampshire Groundwater flooding in the Cranborne Chase in West Hampshire - Rockbourne

2


Wiltshire Groundwater flooding for the Wylye Valley at Wilton

2


Wiltshire Groundwater flooding for the Avon valley from Amesbury to the north of Salisbury

3


Hampshire, West Sussex Groundwater flooding in Finchdean, Dean Lane End and Rowlands Castle

2


Dorset Council Groundwater flooding in the Lower Allen Vale

3


Hampshire Groundwater flooding in Kings Somborne and Little Somborne

3


West Sussex River Lavant

3


Hampshire Groundwater flooding in Littleton, Headbourne, Kings and Martyr Worthy, Easton and Chilland

4


Surrey Groundwater flooding in the Haslemere and Churt areas

4


Surrey Groundwater flooding in Godalming, Shackleford and Hambledon areas

3


Brighton and Hove Groundwater flooding in Patcham

3


Hampshire Winchester Itchen

2


Wiltshire Groundwater flooding in the upper Avon valley and the Nine Mile river

2


Wiltshire Groundwater flooding in the Bourne Valley - The Collingbournes

3


Hampshire Groundwater flooding in the Alton area

2


Gloucestershire River Coln from Fossebridge to Quennington

3


Kent Groundwater flooding in East Kent

3


Wiltshire Groundwater flooding in the Upper Aldbourne Valley

3


Hampshire Groundwater flooding in Bishops Sutton

3


Hampshire Groundwater flooding in Denmead
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