The Environment Agency issued a Flood Alert on 24 January 2026 for the River Thames between Shepperton and Molesey, which includes the Walton-on-Thames area in Surrey. Officials say flooding is possible following heavy rain that fell across the region on 21 and 22 January 2026.
The Environment Agency has warned that while property flooding is not currently expected, river levels are likely to affect riverside paths, low-lying gardens and outbuildings. ‘‘Flooding of low-lying land, gardens, and roads is possible. We urge residents to avoid using low-lying footpaths near local watercourses and to have a flood plan ready,’’ the Agency said. Residents living near the river are being asked to take simple precautions and to stay away from footpaths close to the water’s edge.
The Environment Agency is managing river levels through weir operations, including adjusting gates at Sunbury-on-Thames and Molesey, and expects levels in Walton to peak over the next 48 hours as high flows move downstream. For practical guidance on preparing for rising river levels, Surrey County Council publishes advice for residents (see Surrey County Council flooding advice).
The alert also underlines the purpose of the River Thames Scheme. Construction on the flood-defence project is scheduled to begin in 2026. The scheme will create new flood-relief channels and increase weir capacity to divert excess flow and reduce pressure on reaches such as Walton-on-Thames and Molesey, lowering the risk of this kind of flooding in future.
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