Flood Warning Issued for Wylye Valley at Wilton as Groundwater Levels Remain High

Alert Details

The Environment Agency has issued a Flood Warning (Severity Level 2) for the Wylye Valley at Wilton. This alert indicates that flooding is expected in the region due to high groundwater levels across Salisbury Plain. The warning was officially raised on March 5, 2026, following a period where groundwater levels have remained high despite a recent plateau.

Affected Areas

The primary area affected by this warning is Wilton in the county of Wiltshire, within the Wessex area. Specific monitoring at the Stoford Cross borehole indicates a current groundwater level of 71.43m, which represents a slight fall but remains at a critical threshold.

What You Should Do

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

• Prepare and deploy property resilience measures immediately.
• Ensure that any installed water pumps are in working order.
• Be aware of potential inundation of septic tanks and sewer systems.
• Exercise extreme caution when driving, as roads may be flooded or damaged by floodwater. Avoid driving through floodwater to prevent creating waves that could flood nearby properties.

Expected Conditions

While groundwater levels have begun to plateau, they remain high across Salisbury Plain. Properties in the area may experience flooding in cellars. Additionally, where groundwater is near the surface, intense rainfall is expected to lead to surface water flooding. Further rainfall is forecast starting Thursday, February 26, which may cause levels to rise once again into the weekend.

Timeline

The alert was issued on the morning of March 5, 2026. The Environment Agency is monitoring the situation closely as the forecast rainfall approaches. A formal update to this message is expected to be provided by 2:30 PM on March 11, 2026.