Flood Alert Issued for River Thame and Chalgrove Brook Across Three Counties
This alert is no longer in effect.
Environment Agency issued it on April 6, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this Environment Agency flood warning directly from Environment Agency's official public data feed. See our methodology for full source attribution and refresh cadence.
The Environment Agency has issued a flood alert for Buckinghamshire, Hertfordshire, and Oxfordshire due to high river levels on the Chalgrove Brook and surrounding waterways.
Read this weather record in 30 seconds
- Record type
- Flood Alert
- Affected area
- Buckinghamshire, Hertfordshire, and Oxfordshire
- Issued
- April 6, 2026
- Issuing authority
- Environment Agency
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Buckinghamshire, Hertfordshire, and Oxfordshire.
Alert Details
The Environment Agency has issued a flood alert for the River Thame, Horsenden Stream, and Chalgrove Brook. The alert was officially raised at 10:46 AM on March 5, 2026, due to high river levels that may lead to flooding in the region.
Affected Areas
The geographic scope of this alert includes parts of Buckinghamshire, Hertfordshire, and Oxfordshire. Specifically, flooding of low-lying land and roads is considered possible in the Chalgrove area. While the alert covers the River Thame and Horsenden Stream, officials note that levels along the River Thames currently remain below the flood risk threshold.
What You Should Do
Residents are advised to avoid using low-lying footpaths and roads near rivers, as these areas are most susceptible to flooding. The Environment Agency encourages the public to monitor current river levels via the River Levels Online service for real-time updates.
Expected Conditions
High river levels are currently being observed on the Chalgrove Brook through Chalgrove. The weather forecast for today, March 5, indicates a dry day; however, further rainfall is expected throughout much of tomorrow. Despite the predicted rain, agency officials expect river levels to begin decreasing over the coming days.
Timeline
The alert is effective immediately as of March 5, 2026. The Environment Agency will monitor rainfall and river levels continuously and expects to provide a formal update by 12:00 PM on March 6, 2026, or sooner if the situation changes.
Original source: Environment Agency Official Notice ↗
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Common questions about this Environment Agency flood warning.