Flood alert for Upper River Colne and Radlett Brook
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Rising river levels throughout the evening may lead to flooding.
Flooding is possible from overnight on 12 March 2026 to the following morning.
Locations most affected will be low lying land and roads near rivers.
We are closely monitoring the situation .
Take care and avoid walking, cycling or driving through flood water and consider activating any flood protection products you may have
This message will be updated by 10:00AM on 13 March 2026 or as the situation changes.
Flood alert area: The Upper River Colne and Radlett Brook at Colney Heath, London Colney, Borehamwood and Radlett.
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