A Flood Alert was issued for Mersey Estuary at Warrington in Halton, Warrington on 30th September 2026. Affected watercourses included the Mersey Estuary.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Mersey at Fiddlers Ferry rose 3.84m, peaking at 5.92m, while the Sankey Brook at Liverpool Road climbed 1.40m.
Environment Agency advice issued
There is no longer a threat of flooding, though standing water and debris may still remain. Tidal conditions are expected to improve and 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. Never drive through flood water, just 30cm of fast flowing water is enough to move your car.
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Fiddlers Ferry | River Mersey | +3.84m | 5.92m |
| Liverpool Road | Sankey Brook | +1.40m | 2.77m |
| Westy | River Mersey | +0.65m | 4.11m |
| Higham Avenue | Sankey Brook | +0.33m | 0.59m |
| Ferry Lane, Warrington | Manchester ship canal | +0.28m | 0.53m |
| Acton Bridge | River Weaver | +0.20m | 2.80m |
| Causey Bridge | Sankey Brook | +0.18m | 0.37m |
| Ellamsbridge Road, St Helens | Sutton Mill Brook | +0.12m | 0.18m |
| Pickerings Cut | River Weaver | +0.11m | 4.82m |