Hertfordshire Flood Warnings In Force – EA Alerts





The latest England flood warnings in force for the Hertfordshire and North London region. Data supplied direct from the Environment Agency. Please refresh this page for flood risk updates. Avoid damage to property and travel disruption.

Click here for Flood Warnings and Weather Forecasts.

Flood Warning Area: Hertfordshire and North London

Counties at risk of flooding: Hertfordshire
Areas at risk of flooding: Groundwater flooding in Flamstead.

Rivers At Flood Risk

Groundwater

Current Flood Alert: Flood alert 3

Latest flood alert advice from the Environment Agency: 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 12 February 2025 or as the situation changes.



Flood Level Number / Meaning

1: Severe Flood Warning Severe Flooding, Danger to Life.
2: Flood Warning Flooding is Expected, Immediate Action Required.
3: Flood Alert Flooding is Possible, Be Prepared.
4: Warning no Longer in Force The warning is no longer in force.

Hertfordshire flood warning updated at: 2025-02-05T17:00:50

For more information on flood risks and action to take for the Hertfordshire and North London region of England:
Click here: Hertfordshire Flood Warnings

Scroll to Top