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4Warning no Longer in ForceThe warning is no longer in force

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 - 30 May, 2024



3


Hampshire
Groundwater flooding in the Candovers and Old Alresford

3


Buckinghamshire, Oxfordshire
Groundwater flooding in the Henley and Assendon area

4


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

3


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

3


Gloucestershire
River Coln and its tributaries

3


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

3


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

3


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

3


Hampshire
Groundwater flooding in Bishops Sutton

3


Hampshire
Groundwater flooding in the Alton area

3


Hertfordshire
Groundwater flooding in Kimpton and Lilley Bottom

3


Hertfordshire
Groundwater flooding in Flamstead

3


Cambridgeshire, Suffolk
Groundwater flooding in Newmarket

3


West Berkshire
Groundwater flooding in the Leckhampstead area

3


West Berkshire
Groundwater flooding in the Great Shefford area

3


Buckinghamshire
River Wye and The Hughenden Stream

3


Buckinghamshire
Groundwater flooding in the High Wycombe area

4


North Yorkshire
River Seven catchment

4


North Yorkshire
River Rye catchment

4


East Riding of Yorkshire
River Foulness and Market Weighton catchment

4


North Yorkshire, York
Osbaldwick Beck and Tanghall Beck
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