Flood Alert Issued for Groundwater Flooding in Deane and Ashe, North Hampshire

Alert Details

The Environment Agency has issued a flood alert for the Solent and South Downs area due to rising groundwater levels. The alert (ID: 065FAG001) indicates that flooding is possible starting February 19, 2026, following a significantly wet start to the year.

Affected Areas

The geographic scope of this alert is focused on Deane and Ashe in North Hampshire. The Environment Agency notes that the River Test will be flowing in these specific locations.

What You Should Do

Residents in the warning area are advised to take the following precautions:

• Prepare property resilience measures immediately.
• Ensure that all installed pumps, including those used to reduce water levels, are in proper working order.
• Monitor septic tanks, as high groundwater levels may prevent them from operating effectively.

Expected Conditions

Up to 20mm of rain is forecast to affect Hampshire today, February 18, 2026. While only small amounts of rain are forecast from Thursday, February 19, through Sunday, February 22, groundwater levels are expected to continue rising throughout the remainder of February. These conditions may lead to cellar flooding in Deane within the next two weeks.

Timeline

The alert is effective starting February 19, 2026. The Environment Agency is closely monitoring the situation and will provide an update by 6:00 PM on February 25, 2026, or sooner if conditions change.