Upper River Colne and Radlett Brook flood alert area
We'll update this page when there's a flood alert in the area, which means flooding to low lying land is possible.
Flood alert area: The Upper River Colne and Radlett Brook at Colney Heath, London Colney, Borehamwood and Radlett
Latest river, sea, groundwater and rainfall levels
There are around 3,500 measuring stations, and most are along main rivers and the coast. These levels can help you understand your flood risk now and over the next few days.