Flood Alert Issued for River Thame, Horsenden Stream, 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This alert is no longer in effect.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 parts of Buckinghamshire, Hertfordshire, and Oxfordshire due to high river levels and incoming rainfall.
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 (Severity Level 3) for the Thames area, specifically targeting the River Thame, Horsenden Stream, and Chalgrove Brook. This alert indicates that flooding is possible and residents should remain vigilant.
Affected Areas
The alert covers geographic regions within Buckinghamshire, Hertfordshire, and Oxfordshire. Specific areas of concern include low-lying land and roads in the Chalgrove area, as well as regions adjacent to the River Thame and Horsenden Stream.
What You Should Do
Residents in the affected areas are advised to avoid using low-lying footpaths and roads near rivers, as these may be flooded. The Environment Agency recommends monitoring local weather reports and visiting River Levels Online for real-time updates on water levels.
Expected Conditions
Currently, river levels are high on the Chalgrove Brook through Chalgrove, though levels along the River Thame remain below the flood risk threshold. A weather system is forecast to bring rain starting the afternoon of March 6, 2026, continuing overnight into the following morning. While flooding of low-lying land is possible today, dry conditions are expected to return by tomorrow afternoon, which should allow river levels to fall.
Timeline
The alert was officially raised at 10:23 AM on March 6, 2026. The forecast rain is expected to persist through the night of March 6 and into the morning of March 7, 2026. The Environment Agency expects to provide a formal update on the situation by 12:00 PM on March 7, 2026, or sooner if conditions change significantly.
Original source: Environment Agency Official Notice ↗
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Common questions about this Environment Agency flood warning.