A Flood Alert was issued for River Thames and its small tributaries from Calcutt to Lechlade in Gloucestershire, Oxfordshire, Swindon, Wiltshire between 25th February 2026 and 3rd March 2026. Affected watercourses included the River Thames, Blunsdon Brook, Water Eaton Brook, Marston Meysey Brook, Share Ditch, Bydemill Brook, Westrop Brook, Downington Brook.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Thames at Rushey Lock rose 3.41m, peaking at 3.50m, while the River Thames at Radcot Lock climbed 3.06m.
Environment Agency advice issued
High river levels may lead to flooding. River levels are high on the River Thames and its tributaries from Calcutt to Lechlade. Flooding of low lying land and roads is expected to continue today, 3 March 2026, especially in the Hannington Wick area. The forecast is to remain dry today and for the next few days. River levels are high. We expect levels to decrease over the coming days We are monitoring rainfall and river levels. Avoid low lying footpaths and roads near rivers, which may be flooded. Go to River Levels Online for updates on current river levels. This message will be updated by 12.
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Rushey Lock | River Thames | +3.41m | 3.50m |
| Radcot Lock | River Thames | +3.06m | 3.16m |
| Buscot Lock | River Thames | +2.86m | 2.97m |
| Grafton Lock | River Thames | +2.56m | 2.70m |
| St Johns Lock | River Thames | +2.05m | 2.14m |
| Hannington Bridge | River Thames | +0.50m | 3.96m |
| Whetstone Bridge | Marston Meysey Brook | +0.31m | 0.66m |
| Ewen | River Thames | +0.17m | 0.71m |
| Cricklade | River Thames | +0.07m | 0.91m |
| Somerford Keynes | River Thames | +0.06m | 1.29m |