Groundwater Flood Warning Issued for Damerham and Martin in West Hampshire

Alert Details

The Environment Agency has issued a Flood Warning (Severity Level 2) for groundwater flooding in the Cranborne Chase area of West Hampshire. This alert indicates that flooding is expected due to high groundwater levels in the region.

Affected Areas

The warning specifically covers the following locations in Hampshire:

• Cranborne Chase (West Hampshire)
• Damerham
• Martin

What You Should Do

Residents in the affected areas are advised to take the following precautions:

• Prepare property resilience measures immediately.
• Ensure that any installed water pumps are working and switched on.
• Consider alternative power sources for pumps in the event of a power cut.
• Be prepared for the potential inundation of septic tanks and sewer systems.
• Monitor cellars for signs of flooding.
• Avoid driving through flooded roads.

Expected Conditions

Groundwater levels at the Woodyates borehole are currently recorded at 104.52m. While levels are falling slowly, they remain high. Although the region has experienced a few days of drier weather, additional rainfall is forecast to begin on Thursday, February 26. This precipitation is expected to cause groundwater levels to rise again into the weekend. The Environment Agency reports that flooding of roads and cellars is expected.

Timeline

This alert was officially raised on March 5, 2026. The Environment Agency is closely monitoring the situation and expects to provide an update by 2:00 PM on March 11, 2026, or sooner if conditions change significantly.