Flood Alert Issued for Groundwater Flooding in Twyford and Hensting, Hampshire

Alert Details

The Environment Agency has issued a flood alert (Severity Level 3) for groundwater flooding in the Solent and South Downs area. The alert was officially raised on March 9, 2026, in response to high groundwater levels that are currently impacting the region.

Affected Areas

The alert specifically covers Twyford and Hensting in the county of Hampshire. Flooding is currently affecting the cellars of a small number of properties in these areas. Additionally, water is reported to be flowing across Hensting Lane.

What You Should Do

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

• Prepare and implement property resilience measures.
• Ensure that any installed flood pumps are in good working order.
• Monitor local weather reports as the situation develops.

Expected Conditions

Groundwater levels in Twyford and Hensting are currently high but are reported to be slowly falling. Between 10mm and 20mm of rainfall is forecast for Hampshire between Monday, March 9, and Friday, March 13, 2026. While levels are expected to continue falling throughout the week, there is a possibility of rising levels during the second half of March if the area is affected by further heavy rain.

Timeline

The alert is effective as of March 9, 2026. Unsettled weather is possible over the upcoming weekend and into the following week. The Environment Agency is monitoring the situation closely and expects to provide an updated message by 18:00 on March 16, 2026.