The Environment Agency issued a Flood Alert for the AL7 area of Welwyn Garden City, Hertfordshire, on Friday 6 February 2026 after around 48 hours of persistent rainfall caused local water levels to rise. Officials said the recent rain has made minor flooding possible in low-lying areas and on some local roads.
The alert focuses on the east side of town, including the Panshanger and Haldens neighbourhoods. River levels on the Mimram are being closely monitored — the Panshanger gauge read 0.720m at 12:45pm on 6 February 2026 — and the river is being watched as levels have risen toward the higher end of their recent range and are approaching levels not seen in roughly three years, according to local monitoring and the Environment Agency.
Drivers have been told to expect travel disruption on local routes such as the B195 (Black Fan Road) and the A414. Hertfordshire County Council’s highways team has advised people to avoid driving through floodwater, warning that as little as 30cm of flowing water can float a car.
Under official flood-warning guidance, a Flood Alert means ‘flooding is possible — be prepared.’ Residents are advised to stay updated via the Environment Agency’s Check for Flooding service, check travel plans and prepare basic flood items. Property flooding is not expected to be widespread at present, but the ground is saturated and further rain forecast for Friday evening could cause additional surface water on local roads.
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