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4Warning no Longer in ForceThe warning is no longer in force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 - 22 Feb, 2025

3


Gloucestershire, Oxfordshire River Windrush from Bourton to Newbridge

3


Dorset Council, Somerset South East Somerset Rivers, Upper Reaches

3


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

3


Bracknell Forest, Surrey, Windsor and Maidenhead Chertsey Bourne

3


Dorset Council Lower Frome and tributaries

3


Surrey River Mole and its tributaries from Kinnersley Manor to South Hersham

3


Somerset River Yeo and River Parrett Moors around Muchelney and Thorney

3


Hampshire, West Sussex Western Rother

3


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

3


Hampshire, Surrey, West Sussex Upper River Wey

3


Windsor and Maidenhead, Wokingham Lower River Loddon

3


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

3


Hampshire, Wiltshire River Bourne and tributaries

3


Dorset Council River Piddle and tributaries

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

3


Surrey Cranleigh Waters

3


Surrey, West Sussex Upper Arun

3


Hampshire, Wiltshire Groundwater flooding in the Salisbury Plain area

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


Hertfordshire Groundwater flooding in Flamstead

3


Hertfordshire Groundwater flooding in Kimpton and Lilley Bottom

3


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

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

3


Buckinghamshire, Oxfordshire Groundwater flooding in the Henley and Assendon area

2


Wiltshire Groundwater flooding for the Till

3


Hertfordshire River Mimram in Hertfordshire

3


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

2


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