A Flood Alert was issued for Groundwater flooding in Denmead in Hampshire on 19th February 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Wallington at North Fareham weir rose 1.37m, peaking at 1.91m, while the River Wallington at Denmead climbed 0.75m.
Environment Agency advice issued
High groundwater levels may lead to flooding. Flooding is possible from 20/02/2026, because of a very wet January and February. Water may begin to flood into Anmore Road and could affect the sewerage network from operating efficiently. From Friday 20/02/2026 to Monday 23/02/2026, only small amounts of rain are forecast to affect Hampshire. In the next 2 weeks, flooding could affect cellars of a small number of properties in Anmore Road. Groundwater levels are expected to remain high throughout February and into March. We are closely monitoring the situation . Residents are advised to prepa
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| North Fareham weir | River Wallington | +1.37m | 1.91m |
| Denmead | River Wallington | +0.75m | 34.25m |
| Havant | Hermitage Stream | +0.74m | 6.15m |
| Crosslands Drive | River Lavant | +0.74m | 1.42m |
| Wickham | River Meon | +0.60m | 19.93m |
| West Street | River Lavant | +0.29m | 7.27m |
| Mislingford | River Meon | +0.08m | 0.74m |