Flood Alert Issued for River Thames from Mapledurham to Sonning

Alert Details

The Environment Agency has issued a flood alert for the River Thames from Mapledurham to Sonning. The alert was officially raised at 10:44 AM on February 15, 2026, in response to high river levels that pose a risk to low-lying areas.

Affected Areas

The alert covers the geographic scope of the Thames area, specifically impacting the following counties and regions:

• Oxfordshire
• Reading
• West Berkshire
• Wokingham

Flooding of low-lying land and roads is expected to continue throughout the day, particularly in the Sonning area.

What You Should Do

Residents and commuters in the affected regions are advised to take the following precautions:

• Avoid using low-lying footpaths and roads near rivers, as these areas are susceptible to flooding.
• Monitor local weather conditions and river levels.
• Consult “River Levels Online” for real-time updates on the situation.

Expected Conditions

River levels are currently high but are reported to be slowly falling along the stretch from Mapledurham to Sonning. However, further rainfall is forecast for today, February 15, which has the potential to be heavy at times. While levels are expected to continue their slow decline, they will remain high over the coming days, maintaining the risk of flooding for roads and land near the river.

Timeline

The alert is effective immediately as of February 15, 2026. The Environment Agency is monitoring rainfall and river levels and expects to provide an update by 12:00 PM on February 16, 2026, or sooner if conditions change significantly.