The Ardingly reservoir in Sussex, managed by South East Water and serving approximately 95,000 properties in the Haywards Heath and Uckfield areas, has reached critically low levels at 19% capacity. A severe drought was declared earlier this month across parts of Devon, Cornwall, Dorset, Somerset, and East and West Sussex following the UK’s hottest summer on record. The Environment Agency typically expects reservoir storage to be around 75% at this time of year, indicating that current levels at Ardingly and other reservoirs nationwide represent a significant shortfall.
Water authorities and meteorological experts attribute the crisis to multiple intersecting factors. Rising water demand driven by population growth and new industrial needs from datacenters and energy infrastructure coincides with reduced water availability caused by climate variability and unpredictable rainfall patterns. Additionally, decades of underinvestment in leak repairs and new reservoir construction have compounded supply challenges. Approximately 82% of England and large portions of Wales currently face drought or severe drought conditions, with 120% of average rainfall needed between now and April for areas to exit drought status.
Local residents have expressed frustration over infrastructure constraints, particularly regarding the nearby Weir Wood reservoir operated by Southern Water, which stands at 80% capacity but has been offline since 2018 due to treatment works closure. Emergency pipeline connection plans developed during a previous drought in 2025 were shelved when conditions improved. Southern Water is now pursuing a complete rebuild of the Weir Wood treatment works by 2030, while South East Water investigates the feasibility of a buried pipeline to connect the two reservoirs. Government guidance recommending residents stockpile essential goods has intensified public concern about water security.
Water minister Emma Hardy indicated that despite recent rainfall, the drought situation remains severe and complicated by simultaneous flooding risks as hardened ground struggles to absorb water. She emphasized the need for water companies to continue implementing all available measures to secure current supplies while positioning the region for the coming spring season.
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