Flood Alert Issued for Lower River Colne and Frays River Affecting Multiple Counties
This alert is no longer in effect.
Environment Agency issued it on April 6, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this Environment Agency flood warning directly from Environment Agency's official public data feed. See our methodology for full source attribution and refresh cadence.
The Environment Agency has issued a flood alert for the Lower River Colne and Frays River, warning of high water levels and potential flooding on February 16, 2026.
Read this weather record in 30 seconds
- Record type
- Flood Alert
- Affected area
- Hertfordshire and North London
- Issued
- April 6, 2026
- Issuing authority
- Environment Agency
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Hertfordshire and North London.
Alert Details
The Environment Agency has issued a Flood Alert (Severity Level 3) for the Lower River Colne and Frays River. The alert was officially raised on the morning of February 16, 2026, in response to high river levels that may lead to flooding.
Affected Areas
The alert encompasses the Lower River Colne and Frays River within the Hertfordshire and North London area. The geographic scope includes parts of the following counties and regions:
- Buckinghamshire
- Greater London
- Hertfordshire
- Hillingdon
- Slough
- Surrey
- Windsor and Maidenhead
Specific locations most likely to be 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, and Pound Mill (Wraysbury).
What You Should Do
Residents in the warning area are advised to take care and avoid walking, cycling, or driving through flood water. The Environment Agency is closely monitoring the situation. It is recommended that those in affected areas stay informed and prepare for potential flooding of roads and low-lying land.
Expected Conditions
River levels remain high along the River Colne. Flooding is considered possible throughout the day on February 16, 2026. The primary hazard identified is the inundation of land and transport routes in close proximity to the riverbanks.
Timeline
The alert was issued at 8:44 AM on February 16, 2026. Environment Agency officials expect to provide an update on the situation by 5:00 PM on February 16, 2026, or sooner if conditions change significantly.
Original source: Environment Agency Official Notice ↗
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