Commuters stuck at Euston Station on Tuesday night in sweltering temperatures (Image: Jam Press/@CrimeLdn)
Met Office scientists have warned that UK summer heatwaves could smash records with temperatures reaching a scorching 45C by 2056 as climate change supercharges extreme weather. On the 50th anniversary of the legendary 1976 heatwave, meteorologists have modelled a plausible future scenario under around 2.5C of global warming.
The projection paints a brutal picture: prolonged baking heat lasting two weeks, with nine consecutive days exceeding 40C somewhere in the UK. Peak temperatures in the 2056 scenario would hit 45C in England, 41C in Wales, 38C in Scotland and 30°C in Northern Ireland — turning the 1976 drought into something far more dangerous.
A woman covers her face from the sun with the Shard in the background (Image: ANDY RAIN/EPA/Shutterstock)
The stark warning lands as the Met Office issues a Red Extreme Heat National Severe Weather Warning for parts of the country on Wednesday and Thursday. Temperatures this week are forecast to shatter June records, bringing severe risks to health, infrastructure, transport, energy and water supplies.
Professor Stephen Belcher CBE, Met Office chief scientist, said the current heatwave is already a major event made more likely and intense by human-caused climate change.
Mr Belcher said: “To see temperatures like this in the UK in June is sobering. Events like this bring home the implications of climate change, with very high temperatures and humidity bringing significant health implications from heat stress.”
The 1976 summer remains etched in national memory for its relentless heat, drought, water shortages and standpipes in the streets. Research released today shows a similar heatwave would already be around 3°C hotter in today’s warmed climate.
How the future could look (Image: Met Office)
Professor Ed Hawkins MBE, of the University of Reading, said: “1976 was an extraordinary event, but it happened in a much cooler climate. As global temperatures rise, heatwaves like this are becoming more intense and more frequent.”
Average UK summers have warmed by about 1.4°C since 1976, with extremes shifting even faster. The 2056 scenario is not a specific forecast but a science-based illustration of how risks are evolving.
Professor Hayley Fowler FRS, of Newcastle University, warned that future heatwaves would amplify 1976-style impacts: “The 1976 heatwave was about more than just heat.
“It led to drought, water shortages and significant impacts on daily life. In a warmer climate, those impacts are likely to become more severe.”
Scientists say greater challenges lie ahead, including heightened risks to vulnerable people, wildfire threats, pressure on food production and strain on critical services.
The Met Office stressed the scenario underscores the need for urgent planning. Its impact-based warnings are designed to help government, industry and the public prepare for extremes that are no longer rare.
Mr Belcher added: “By using data from Met Office climate projections, we can glimpse into what an event like the 1976 summer would look like in the 2050s. It is a stark realisation to see the maximum temperatures reach 45°C.”
As the UK swelters under current warnings, the message from meteorologists is clear: the heat is rising — and the coming decades could test the country like never before.