Flood Alert Issued for Groundwater in Vernham Dean, Upton, and the Bourne Valley
This alert is no longer in effect.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 Hampshire's Bourne Valley as high groundwater levels threaten cellars and septic tank operations in Upton.
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- Record type
- Flood Alert
- Affected area
- Hampshire, England
- 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 Hampshire, England.
Alert Details
The Environment Agency has issued a flood alert for groundwater flooding affecting Vernham Dean, Upton, and the Bourne Valley. The alert was officially raised on March 10, 2026, at 4:38 PM following sustained high groundwater levels in the Solent and South Downs area.
Affected Areas
The primary geographic focus of this alert is the Bourne Valley in Hampshire. Specific locations mentioned include:
- Upton: Currently experiencing steady groundwater levels with flooding affecting a small number of cellars.
- Vernham Dean: Borehole levels have fallen by 1.08m, though the alert remains in place.
- Hurstbourne Tarrant, Stoke, and St Mary Bourne: Included in the monitoring area, though significant impacts to property are not currently expected in these specific locations.
What You Should Do
Residents in the warning area, particularly those in Upton, are advised to take the following precautions:
- Prepare and deploy property resilience measures.
- Ensure that any installed basement or floor pumps are in good working order.
- Be aware that septic tanks in the area may struggle to operate properly due to the high water table.
Expected Conditions
Groundwater levels remain high throughout the valley. While recent measurements show a decrease of 1.08m at the Vernham Dean borehole, levels at Upton remain relatively steady. Forecasts indicate mostly dry weather for Tuesday, March 10, Wednesday, March 11, and Saturday, March 14. However, a weather system on Thursday, March 12, and Friday, March 13, is expected to bring between 20mm and 25mm of rainfall, which will likely prolong the ongoing groundwater flooding impacts.
Timeline
The alert is currently active as of March 10, 2026. While dry intervals are expected early in the week, the anticipated rainfall on March 12-13 is expected to extend the duration of the hazard. The Environment Agency is closely monitoring the situation and expects to provide a formal update by 6:00 PM on March 17, 2026.
Original source: Environment Agency Official Notice ↗
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