Flood Alert Issued for Upper River Thames Tributaries in Gloucestershire and Wiltshire

Alert Details

The Environment Agency has issued a Flood Alert (Severity Level 3) for the tributaries on the Upper River Thames above Cricklade. This alert indicates that high river levels may lead to flooding in the region.

Affected Areas

The alert covers parts of Gloucestershire and Wiltshire. Specific watercourses affected include:

• Flagham Brook
• Swill Brook
• Hankerton Brook
• Hykemeres Stream
• Derry Brook
• River Key

Flooding of low-lying land and roads is particularly expected to continue in the Oaksey area.

What You Should Do

Residents and travelers in the affected areas are advised to take the following precautions:

• Avoid using low-lying footpaths and roads near rivers, as these may be flooded.
• Monitor current river levels via the River Levels Online service.
• Stay prepared for changing conditions as further rainfall is expected.

Expected Conditions

While river levels on the Swill Brook are currently falling slowly, they remain high. Further rain is forecast for today, February 15, 2026, which has the potential to be heavy at times. River levels are expected to rise again in response to this forecasted rainfall. Officials note that levels will remain high and responsive to further rainfall over the next couple of days.

Timeline

The alert was officially raised at 9:32 AM on February 15, 2026. The Environment Agency expects to provide an update by 12:00 PM on February 16, 2026, or sooner if the situation changes significantly.