A Flood Alert was issued for Silk Stream and the Deans, Edgware, Dollis, Mutton, Wembley and Wealdstone Brooks in Barnet, Brent, Greater London, Harrow on 25th October 2026. Affected watercourses included the Silk Stream; Dollis Brook; Deans Brook; Edgware Brook; Mutton Brook; Wealdstone Brook; Wembley Brook.
During this event, FloodRadar monitoring gauges recorded notable rises. The Silk Stream at Colindale rose 1.06m, peaking at 1.22m, while the Silk Stream at Edgware Hospital climbed 0.64m.
Environment Agency advice issued
There is no longer a threat of flooding, though standing water and debris may still remain. Weather conditions are expected to improve. Further light rainfall is expected on Monday 26 October but no flooding is expected. We will continue to monitor the situation and will issue further alerts or warnings if necessary. Continue to take care on waterside roads and footpaths and don't put yourself in unnecessary danger.
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Colindale | Silk Stream | +1.06m | 1.22m |
| Edgware Hospital | Silk Stream | +0.64m | 1.31m |
| Wembley | Wealdstone Brook | +0.63m | 0.73m |
| Kenton Lane | Wealdstone Brook | +0.60m | 0.72m |
| Whetstone | Dollis Brook | +0.55m | 0.58m |
| Brent Cross | River Brent | +0.53m | 0.66m |
| Stanmore, Wolverton Road | Edgware Brook | +0.40m | 0.49m |
| Hampstead Suburb | Mutton Brook | +0.29m | 1.08m |
| North Finchley | Dollis Brook | +0.24m | 0.49m |
| Edgware, Deans Brook | Deans Brook | +0.06m | 0.87m |