The latest England flood warnings in force for the
Hertfordshire and North London region. Data supplied direct from the Environment Agency. Please refresh this page for flood risk updates. Avoid damage to property and travel disruption. Click here for
Flood Warnings and Weather Forecasts.
Flood Warning Area: Hertfordshire and North London
Counties at risk of flooding:
Buckinghamshire, Greater London, Hillingdon, Slough, Surrey, Windsor and Maidenhead Areas at risk of flooding: Colne Brook at Iver and Colnbrook.
Rivers At Flood Risk
Colne Brook
Current Flood Alert: Flood alert 3
Latest flood alert advice from the Environment Agency: High river levels today may lead to flooding. Flooding is possible on 16 February 2026 following rainfall overnight on 15 February 2026. Locations most affected will be low lying land and roads near rivers are Colnbrook Village, Poyle, Albany Park, High Street, Mill Street, Fawsley Close and Myrtle Close. We are closely monitoring the situation . Avoid using low lying footpaths and any bridges near local watercourses . This message will be updated by 5:00PM on 16 February 2026 or as the situation changes.
Flood Level Number / Meaning
1: Severe Flood Warning Severe Flooding, Danger to Life. 2: Flood Warning Flooding is Expected, Immediate Action Required. 3: Flood Alert Flooding is Possible, Be Prepared. 4: Warning no Longer in Force The warning is no longer in force. Buckinghamshire, Greater London, Hillingdon, Slough, Surrey, Windsor and Maidenhead flood warning updated at: 2026-02-16T08:44:24 For more information on flood risks and action to take for the Hertfordshire and North London region of England:
Click here:
Buckinghamshire, Greater London, Hillingdon, Slough, Surrey, Windsor and Maidenhead Flood Warnings
