Heatwave leaves thousands in southeast England facing water shortages

Thousands of homes in southeast England lost water or were left with weak pressure as record heat collided with a dry spring, pushing more than 20,000 people into outages and exposing how little margin Britain’s aging water system has when extremes arrive together. In Whitstable, about 8,000 residents were affected, people queued for emergency supplies and some businesses were forced to close during one of the busiest holiday weeks of the year.

South East Water apologized and said unusually high temperatures had driven demand far beyond normal levels. The company said it had planned for hot weather, but still faced low storage across its supply area. On May 27, it pumped 628 million litres of water, about 100 million litres above the seasonal average. South East Water normally supplies around 543 million litres a day, and summer demand can rise to more than 600 million litres a day. Its service updates still showed Kent supply issues on May 29.

The disruption landed after a parched spring. England received just 38% of its long-term average rainfall in April 2026, according to the Environment Agency, and east and south-east England had their driest April since 2011. Soil moisture deficits built quickly across the country during the month, with soils in the south-east and east much drier than expected for the time of year.

The heat added to the pressure. The Met Office said 34.8C at Kew Gardens on May 25 provisionally broke the UK spring and May temperature record, before 35.1C at Kew Gardens on May 26 provisionally set a new hottest May temperature in the country. The combination of dry ground and extreme heat turned a local outage into a broader test of resilience.

South East Water’s March 18 resilience plan said it had begun a six-month programme of engineering works and operational changes to reduce the risk of outages in Tunbridge Wells, Maidstone, Canterbury and Whitstable. The company said those measures were a response to recent supply interruptions and customer feedback, underscoring that the warning signs were already visible before the heatwave hit.

Water Minister Emma Hardy said companies must prepare for more frequent periods of extreme heat. The Climate Change Committee has said the United Kingdom’s preparations for climate change are inadequate, estimating that adaptation spending of about £11 billion a year will be needed and warning that water supply shortfalls could exceed five billion litres a day by 2050. The outage in Kent showed how quickly climate stress can overwhelm old infrastructure, even in one of Europe’s wealthiest regions.