Health Warnings as Heatwave Set to Break 50-Year June Record

By the Editorial Team · Wednesday, June 24, 2026

Britain is enduring its hottest June day in 50 years with temperatures reaching 34.6°C and forecasts predicting up to 39°C by Thursday, prompting rare red weather and health alerts across multiple regions. This extreme heat is disrupting daily life through school closures, transport delays, and increased wildfire risks, highlighting growing climate change impacts as scientists warn of even more severe future heatwaves.

Britain is experiencing a record-breaking heatwave this week, with temperatures reaching 34.6°C on Tuesday, marking the hottest June day in 50 years. The previous record of 35.6°C was set in Hampshire during the summer of 1976. Forecasters predict temperatures could climb as high as 36°C today and potentially reach 39°C by Thursday.

The Met Office has issued its second ever red weather warning, covering a large area from London to Swansea and stretching northward to Birmingham. The warning, effective from 9 a.m. Wednesday until 9 p.m. Thursday, highlights the heightened risk of wildfires due to the combination of high temperatures and recent thunderstorms. Alongside this, the UK Health Security Agency (UKHSA) has issued its second ever heat-health red alert for six regions: the West Midlands, East Midlands, South East, South West, London, and East of England. An amber alert is also in place for the North West, North East, and Yorkshire and the Humber.

The extreme heat has disrupted daily life across several counties. Dozens of schools, mainly primary institutions in Bristol, Hampshire, Berkshire, Oxfordshire, Gloucestershire, Somerset, Dorset, and Wiltshire, have either closed or shortened their hours. Many schools have relaxed dress codes, allowing pupils to wear PE kits instead of full uniforms. The National Association of Head Teachers has issued guidance to its members regarding the effects of the heat on pupils and staff, legal considerations, and criteria for closing schools.

Transport services have also been severely affected. Train operators have warned of potential delays and cancellations due to the risk of overhead electric wires sagging, rail buckling, and lineside fires. The Elizabeth Line in London was flooded by severe storms on Monday night, causing cancellations to Heathrow airport services. Avanti West Coast and Chiltern Railways have canceled a significant number of trains on Wednesday and Thursday, with National Rail allowing ticket holders to travel on Friday or claim refunds.

Authorities report a fatality linked to the heatwave: on Monday, a woman suffered a medical emergency at Southbourne beach near Bournemouth and later died.

Scientists emphasize the significance of this heat event in the context of climate change. Met Office chief scientist Prof Stephen Belcher noted that the 50th anniversary of the 1976 heatwave serves as a stark reminder of changing climate patterns, pointing out that UK summers have warmed by an average of 1.4°C since then. Newcastle University’s Prof Hayley Fowler referenced the 1976 heatwave’s lasting impact, including harvest failures, food price increases, heat-related illnesses and deaths, and widespread wildfires. Meanwhile, Prof Ed Hawkins from Reading University contrasted the 1976 event with present conditions, warning that while 1976 was extraordinary in a cooler era, future decades will likely bring far higher temperatures, with projections of 45°C heatwaves by 2056 for those born in 1976 and significant challenges for younger generations.

The ongoing heatwave underscores concerns about increasingly frequent and intense extreme weather events as the climate continues to warm.

This article was reported by synthesizing coverage from multiple independent news outlets to present a balanced, unbiased account. Read about our editorial standards. Spotted an error? Let us know.