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4Warning no Longer in ForceThe warning is no longer in force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 - 06 Apr, 2025

3


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

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 Deane and Ashe in North Hampshire

3


Buckinghamshire, Oxfordshire Groundwater flooding in the Henley and Assendon area

3


Hertfordshire River Mimram in Hertfordshire

3


West Berkshire Groundwater flooding in the Leckhampstead area
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