Upper River Colne and Radlett Brook

No current or recent warnings at this location.

Most recent flood warnings and alerts for Upper River Colne and Radlett Brook

• Warning no longer in force
  Fri 28 Aug 2026, 9:08am

• Flood alert
  Thu 27 Aug 2026, 5:35pm

• Flood alert
  Thu 27 Aug 2026, 9:39am

• Flood alert
  Wed 26 Aug 2026, 9:38pm

• Warning no longer in force
  Fri 13 Mar 2026, 9:47am

• Flood alert
  Thu 12 Mar 2026, 6:37pm

• Warning no longer in force
  Thu 19 Feb 2026, 9:07am

• Flood alert
  Wed 18 Feb 2026, 4:08pm

• Warning no longer in force
  Mon 16 Feb 2026, 9:17am

• Flood alert
  Sun 15 Feb 2026, 4:42pm

Flood Warning Area Details

The Upper River Colne and Radlett Brook at Colney Heath, London Colney, Borehamwood and Radlett

Region: Herts and North London

Country: England

Counties covered: Hertfordshire

Watercourses covered: River Colne

Area covered by this alert location

The area bounded in blue on the map shows the area covered by flood alerts and warnings for Upper River Colne and Radlett Brook.

Note: the area shown on the map is the area covered by flood alerts and warnings. It is not a live map of current flooding. The area covered broadly equates to the area where the risk of flooding in any year is greater than 1% (the "hundred year" flood risk).

Other Nearby Flood Warning Locations