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This is an archived message. The status has changed more recently.
Flooding possible. Be prepared.
Groundwater levels have responded to high effective rainfall during the autumn and early winter, and have risen to very high levels at our observation borehole at River Hill, close to Flamstead. Groundwater levels are unusually high for this time of year and have now reached a level where communities are at risk of being affected by flooding from groundwater.
We expect levels to remain high over the coming months in response to the high autumn and early winter rainfall. Low lying land and roads such as those in the Trowley Bottom area near Flamstead will therefore be at risk of flooding. Due to the nature of groundwater behaviour, this situation could continue for several weeks or longer.
We are continuing to monitor groundwater levels and will update this message on Wednesday 16th April 2025, or as the situation changes.
Information supplied by the Environment Agency
This information last updated 2:22pm, Wednesday 2nd April 2025.
This page is a dedicated URL for a specific message issued at a particular time. You should not bookmark this page, as the current situation may have changed since this message was issued.
Warning no longer in force
Thu 1 May 2025, 9:54am
Flood alert
Wed 23 Apr 2025, 10:44am
Flood alert
Wed 16 Apr 2025, 2:58pm
Flood alert
Wed 9 Apr 2025, 1:28pm
Flood alert
Wed 2 Apr 2025, 2:22pm
Flood alert
Wed 26 Mar 2025, 1:47pm
Flood alert
Wed 19 Mar 2025, 3:22pm
Flood alert
Wed 12 Mar 2025, 5:30pm
Flood alert
Wed 5 Mar 2025, 4:42pm
Flood alert
Wed 26 Feb 2025, 3:20pm
Areas at risk of groundwater flooding around Flamstead, including Trowley Bottom and Lower Sawpit Wood
Region: Herts and North London
Country: England
Counties covered: Hertfordshire
Watercourses covered: Groundwater
The area bounded in blue on the map shows the area covered by flood alerts and warnings for Groundwater flooding in Flamstead.
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).
No current or recent warnings.
No current or recent warnings.
No current or recent warnings.
No current or recent warnings.