Flood Alert Issued for Groundwater Flooding in Hampshire and Wiltshire Communities

Alert Details

The Environment Agency has issued a Flood Alert (Severity Level 3) for groundwater flooding in the Solent and South Downs area. This alert remains active as officials monitor high groundwater levels affecting multiple communities.

Affected Areas

The alert specifically covers the following geographic regions and villages:

• Hampshire and Wiltshire: Pitton, West Tytherley, Nether Wallop, and Broughton.

Expected Conditions

Groundwater levels remain high across the region but are currently in a state of slow decline. Specific observations include:

• Pitton: Water levels have fallen by 13cm over the past week.
• West Tytherley: Levels peaked on Friday, March 13, 2026, and have since decreased by 9cm.

Despite the falling levels, flooding is expected to continue affecting cellars in Nether Wallop, Pitton, and West Tytherley. Additionally, residents in Pitton and West Tytherley should prepare for impacts on local roads and the sewerage system.

What You Should Do

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

• Prepare and deploy property resilience measures.
• Ensure that any installed basement or cellar pumps are in good working order.
• Monitor local conditions and road safety reports before traveling.

Timeline

The alert was officially raised on March 16, 2026. While dry weather is forecast from Monday, March 16, through Friday, March 20, groundwater levels are expected to fall only gradually. Flooding impacts are projected to persist for much of the month of March. The Environment Agency will provide an updated status report by 18:00 on March 23, 2026.