River Levels
River Levels

River Mimram in Hertfordshire

Flood alert

Flooding is affecting low lying land and roads close to the River Mimram, due to persistent rainfall in December and January, leading to high groundwater levels.

Flooding is currently affecting the Fulling Mill Lane, Singlers Marsh, and Codicote Road areas in Welwyn.

Flooding to homes and businesses is unlikely at this time, but there may be a risk to very low-lying properties or those with basements. River levels in other areas remain below levels of concern. The forecast is mostly dry for the next 5 days with some light rain showers.

Avoid using low lying footpaths and any bridges near local watercourses and do not attempt to walk or drive through flood water. We are continuing to monitor the situation.

This message will be updated by 5pm, Wednesday 19th February 2025, or as the situation changes.

Information supplied by the Environment Agency

This information last updated 4:36pm, Friday 14th February.

Flood Warning Area Details

The River Mimram at Whitwell, Welwyn, Tewin, Hertingfordbury and Hertford

Region: Herts and North London

Country: England

Counties covered: Hertfordshire

Watercourses covered: Mimram

Area covered by this alert location

The area bounded in blue on the map shows the area covered by flood alerts and warnings for River Mimram in Hertfordshire.

Note: the area shown on the map is the area covered by flood alerts and warnings. It is not a live map of current flooding. The area covered broadly equates to the area where the risk of flooding in any year is greater than 1% (the "hundred year" flood risk).

Other Nearby Flood Warning Locations

River Mimram from Tewin to Hertford
The River Mimram from Tewin to Hertford including Hertingfordbury

No current or recent warnings.

River Mimram at Welwyn
The River Mimram at Welwyn including Welwyn Garden City and Digswell

No current or recent warnings.

River Lee at Hertford
River Lee at Hertford including Lemsford, Hatfield, Ware and Stanstead Abbotts

No current or recent warnings.

Stevenage Brook at Stevenage
The Stevenage Brook at Stevenage including Hooks Cross

No current or recent warnings.

River Lee at Luton, Harpenden and Wheathampstead
River Lee at Luton, Harpenden including Wheathampstead and East Hyde

No current or recent warnings.

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