A Flood Alert was issued for Groundwater flooding in Twyford and Hensting in Hampshire on 23rd March 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The Groundwater Level at Clarendon rose 0.27m, peaking at 70.84m.
Environment Agency advice issued
Groundwater levels in Twyford and Hensting are high but slowly falling. Flooding is expected to be affecting cellars of a small number of properties in Twyford and Hensting. From Monday 23/03/2026 to Friday 27/03/2026, only very small amounts of rain are forecast. Groundwater levels will continue to fall but flooding impacts will continue into early April. We are closely monitoring the situation. Residents are advised to ensure that pumps are working where they have been installed. This message will be updated by 18:00 30/03/2026.
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Clarendon | Groundwater Level | +0.27m | 70.84m |