A Flood Alert was issued for Lower Lee tributaries in Barnet, Enfield, Essex, Greater London, Haringey, Hertfordshire, Redbridge, Waltham Forest on 27th August 2026. Affected watercourses included the Ching Brook, Cobbins Brook, Nazeing Brook, Pymmes Brook, Salmons Brook, Turkey Brook, Small River Lee, Rags Brook, Trinity Marsh Ditch.
During this event, FloodRadar monitoring gauges recorded notable rises. The Small River Lee at Cheshunt, Windmill Lane rose 0.41m, peaking at 0.81m, while the Rags Brook at Cheshunt, Rosedale Way climbed 0.28m.
Environment Agency advice issued
Rising river levels may lead to flooding this evening Thursday 27 August 2026 due to forecast heavy rain and storms. Locations most affected will be Church Road (Boundary Ditch), Chine Road Bridge, St Leonards Road, Elizabeth Close, Middle Street, Turkey Street, Slades Rise, Links Side, World's End, Nazeing, Enfield, Lower Nazeing. Flooding from surface water, where water gathers and flows off road surfaces, could also occur. We expect river levels in areas that receive the heaviest rain to respond by rising quickly. Further heavy rain and thunderstorms are forecast tonight Thursday 27 August
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Cheshunt, Windmill Lane | Small River Lee | +0.41m | 0.81m |
| Cheshunt, Rosedale Way | Rags Brook | +0.28m | 1.04m |
| Waltham Abbey, Sewardstone Road | Cobbins Brook | +0.08m | 0.16m |
| Enfield, Ordance Road | Small River Lee | +0.08m | 0.15m |
| Edmonton, Silver Street | Pymmes Brook | +0.08m | 0.11m |
| Enfield, Albany Park | Turkey Brook | +0.06m | 0.09m |
| Arnos Park | Pymmes Brook | +0.06m | 2.65m |
| Waterhall | River Lee | +0.06m | 0.16m |