After a historic May heatwave that saw temperatures soar to 35.1°C in London and triggered a string of fatal water incidents, the UK is bracing for a dramatic shift. Heavy rain is set to sweep the country tomorrow, according to the Met Office, cooling temperatures and breaking the prolonged hot spell. The weather change, while welcome, comes after a deadly period that left at least 12 people dead in water-related incidents, as reported by the source.

35.1°C at Kew Gardens: The Hottest May Day on Record Ends

Tuesday became the hottest May day ever recorded in both England and Wales, with the Met Office confirming a reading of 35.1°C at Kew Gardens in south-west London and 32.9°C at Cardiff's Bute Park. the heatwave, which saw temperatures above 30°C for several consecutive days, has now broken, as Met Office spokesman Grahame Madge noted: “After a lengthy and historic hot spell of days in the UK above 30°C, today is very likely to be the first day which breaks that series.” Outbreaks of rain are expected to spread across the country, with temperatures easing over the weekend and into next week.

12 Fatalities in Open Water: A Grim Toll Under Scorching Heat

Emergency services were stretched during the heatwave as a string of fatal incidents involving children and teenagers occurred at beaches,lakes, and rivers. The source reports that a 16-year-old boy was confirmed to be the 12th person to die in a water-related incident over the course of the recent heatwave. Police recovered his body from Bracklinn Falls near Callander in Stirlingshire, Scotland, at around 6:45pm on Thursday. The deaths underscore the hidden dangers of extreme heat as thousands flocked to open water to cool off.

22 Counties, 21 Hours: The Heavy Rain Forecast in Detail

The Met Office has predicted heavy downpours stretching across much of the UK over a 21-hour period, with 22 counties set to be affected. Parts of London, Kent, Cornwall, Greater Manchester, Yorkshire and Scotland are among the areas forecast for up to 8mm of rain,with some places facing downpours until 10am the next day. met Office meteorologist Aidan McGivern said the pattern of rain and showers followed by brighter spells is likely to repeat next week. The rain, while ending the heatwave, could bring localised flooding, the source notes.

Water Shortages and Extra Billion Litres: Infrastructure Under Strain

Thames Water reported that an extra billion litres of water were used across London and the South East over the bank holiday weekend compared to the same weekend in 2025. Meanwhile, thousands of residents in the Kent town of Whitstable were left without water after soaring temperatures drove extremely high demand. Storage reservoirs serving the area reached a critical level, according to South East Water incident manager Steve Benton. The heatwave exposed vulnerabilities in water infrastructure that may need urgent atttention as such events become more frequent.