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4Warning no Longer in ForceThe warning is no longer in force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 - 19 Apr, 2024

3


Oxfordshire, West Berkshire Groundwater flooding in the Lambourn Valley catchment

3


Hampshire Groundwater flooding in the Candovers and Old Alresford

3


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

3


Hampshire, Wiltshire Groundwater flooding in the Salisbury Plain area

3


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

3


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

3


Gloucestershire, Wiltshire River Churn and its tributaries

3


Wiltshire River Wylye and tributaries

3


Gloucestershire, Oxfordshire River Windrush from Bourton to Newbridge

3


Buckinghamshire, Oxfordshire Groundwater flooding in the Henley and Assendon area

3


Oxfordshire Ginge Brook

3


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

3


Hampshire, Wiltshire River Bourne and tributaries

4


Herefordshire River Lugg south of Leominster

3


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

3


Hampshire Groundwater flooding in Twyford and Hensting

3


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

3


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

3


Dorset Council Groundwater flooding in the West of Dorset

3


Dorset Council River Piddle and tributaries

3


Gloucestershire River Coln and its tributaries

3


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

3


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

3


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

3


Gloucestershire River Dikler from Condicote to Little Rissington

2


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

3


West Berkshire Groundwater flooding in West Ilsley, East Ilsley, Compton, Chilton and West Hagbourne

3


Wiltshire Groundwater flooding in the Upper Aldbourne Valley

3


Hampshire Groundwater flooding in the Crondall area

3


Swindon, Wiltshire Groundwater flooding in the Upper Og Valley

3


Hampshire Groundwater flooding in Kings Somborne and Little Somborne

3


Buckinghamshire Groundwater flooding in Chesham

3


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

3


Hampshire Groundwater flooding in Bishops Sutton

3


Hampshire, Wiltshire Groundwater flooding in villages surrounding Andover

2


Dorset Council Groundwater flooding for the South Winterbourne Valley

3


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

3


Hampshire Groundwater flooding in Bramdean and Cheriton

3


Hampshire Groundwater flooding in the Alton area

3


Hampshire Groundwater flooding in Hursley

3


Hampshire Groundwater flooding in Deane and Ashe in North Hampshire

3


Hertfordshire Groundwater flooding in Kimpton and Lilley Bottom

3


Hertfordshire Groundwater flooding in Flamstead

3


Hampshire Groundwater flooding in Hambledon

3


Cambridgeshire, Suffolk Groundwater flooding in Newmarket

3


Kent Nailbourne and Little Stour

3


Kent Groundwater flooding in East Kent

3


Barking and Dagenham, Bexley, Bromley, Croydon, Greater London, Greenwich, Havering, Kent, Kingston upon Thames, Lambeth, Lewisham, Merton, Newham, Southwark, Surrey, Sutton, Wandsworth Groundwater flooding in South East London

3


West Berkshire Groundwater flooding in the Leckhampstead area

3


West Berkshire Groundwater flooding in the Great Shefford area

3


Hampshire Groundwater flooding in the Sherborne St John area

3


West Sussex Groundwater flooding in upper River Ems Valley

3


Derbyshire, Leicestershire, Nottinghamshire Lower River Soar in Leicestershire

3


Buckinghamshire River Wye and The Hughenden Stream

3


Hampshire, Wokingham River Whitewater and River Hart

4


Cumberland Upper River Derwent, Stonethwaite Beck and Derwent Water

3


Hertfordshire River Mimram in Hertfordshire

3


Buckinghamshire Groundwater flooding in the High Wycombe area

3


Wiltshire River Ebble and tributaries

4


Norfolk The tidal Rivers Bure, Ant and Thurne

2


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

2


Hampshire North and East Hayling at Northney, Tye and Selsmore

3


North Yorkshire River Seven catchment

3


North Yorkshire River Rye catchment
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