Flood Alert Issued for River Thames Between Datchet and Shepperton Green

Alert Details

The Environment Agency has issued a Flood Alert (Severity Level 3) for the River Thames. The alert was officially raised on February 15, 2026, at 4:43 PM following a rise in river levels.

Affected Areas

The alert covers the River Thames from Datchet to Shepperton Green. The geographic scope includes the following counties and regions:

• Slough
• Surrey
• Windsor and Maidenhead

Flooding of low-lying land and roads is expected to continue over the coming days, with particular concern for the Penton Hook, Old Windsor, Runnymede, and Chertsey areas.

What You Should Do

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

• Avoid walking, cycling, or driving through flood water.
• Avoid using low-lying footpaths and any bridges located near local watercourses.
• Monitor local conditions as river levels remain responsive to further rainfall.

Expected Conditions

High river levels are currently present and may lead to flooding of roads and low-lying land. Further rainfall is forecast for the afternoon and evening of February 15, 2026, which is expected to be heavy at times. The Environment Agency expects river levels to remain high for the next several days in response to this additional precipitation.

Timeline

The flood alert is effective immediately as of February 15, 2026, and is expected to persist into February 16, 2026. The Environment Agency will monitor the situation closely and plans to provide an updated message by 8:00 PM on February 16, 2026, or sooner if the situation changes.