Flood Alert Issued for Lower River Colne and Frays River Across Multiple Counties

Alert Details

The Environment Agency has issued a flood alert (Severity Level 3) for the Lower River Colne and Frays River. This alert was officially raised at 8:58 AM on February 17, 2026, by the Hertfordshire and North London office.

Affected Areas

The geographic scope of this alert includes Buckinghamshire, Greater London, Hertfordshire, Hillingdon, Slough, Surrey, and Windsor and Maidenhead. Specific locations most affected include low-lying land and roads near rivers around:

• Denham Colne
• Willow Bank
• Fountains Mill
• Clisbys Bridge
• West Drayton
• Yiewsley
• Poyle Trading Estate
• Stanwell Mill
• Staines Moor
• Pound Mill (Wraysbury)

What You Should Do

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

• Take care and avoid walking, cycling, or driving through flood water.
• Monitor local conditions closely as river levels remain high.
• Stay away from low-lying land and roads near the River Colne.

Expected Conditions

River levels are currently high, which may lead to flooding of low-lying land and roads. Flooding is considered possible throughout the day on February 17, 2026. The Environment Agency is closely monitoring the situation as it develops.

Timeline

The alert was issued at 8:58 AM on February 17, 2026. This message is scheduled to be updated by 5:00 PM on February 17, 2026, or sooner if the situation changes.