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 24th 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 1.05m, peaking at 1.22m, while the Silk Stream at Edgware Hospital climbed 0.63m.
Environment Agency advice issued
Rising river levels this evening may lead to flooding. Flooding is possible from the evening of Saturday 24 October due to heavy rainfall from Storm Austen and Boelo. Locations most affected will be low lying land and roads near rivers. Further heavy rain is forecast for this evening. We expect river levels to peak tonight and begin to fall during tomorrow morning, Sunday 25 October. We are monitoring rainfall and river levels . Take care and avoid walking, cycling or driving through flood water. This message will be updated by 10:00AM on Sunday 25 October or as the situation changes.
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Colindale | Silk Stream | +1.05m | 1.22m |
| Edgware Hospital | Silk Stream | +0.63m | 1.31m |
| Wembley | Wealdstone Brook | +0.62m | 0.73m |
| Kenton Lane | Wealdstone Brook | +0.60m | 0.72m |
| Whetstone | Dollis Brook | +0.55m | 0.58m |
| Brent Cross | River Brent | +0.52m | 0.66m |
| Stanmore, Wolverton Road | Edgware Brook | +0.48m | 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 |