An extraordinary early-season heatwave is currently sweeping across Western Europe, breaking hundreds of long-standing temperature records and leaving climate scientists stunned by the scale and severity of the extreme warmth. What would be an anomalous heat event even at the height of summer is now unfolding in spring, with far-reaching impacts that extend far beyond the continent’s borders.
Across the region, nations have reported all-time May temperature highs that far outpace previous records. On Tuesday alone, the United Kingdom saw temperatures climb above 35°C — a full 2°C higher than the previous national record for the month of May. UK’s Met Office described the reading as exceptional for any time of year, let alone the spring season.
France is bearing the brunt of the historic warmth, with national weather service Météo-France confirming that hundreds of local and regional temperature records have fallen across the country amid what it calls an unprecedented early heatwave. Beyond France and the UK, Ireland’s national May temperature record was broken by more than 1°C, while Germany, Italy, Spain and Switzerland have all recorded unseasonably hot conditions for this time of year. The extreme heat is not limited to Europe: temperatures in India’s capital city of Delhi have already hit 45°C this season, signaling a global pattern of intensifying heat extremes.
Climate scientists agree that while the immediate trigger for this event is a stalled high-pressure “heat dome” that traps warm air over the European continent, human-caused climate change — driven primarily by the burning of coal, oil and natural gas — has drastically amplified the intensity of the heat. Data from the Copernicus Climate Service shows that Europe has warmed at a rate of 0.56°C per decade over the past 30 years, more than twice the global average warming rate. While this may seem like a small incremental increase, climate experts note it represents a seismic shift that has supercharged heat extremes across the continent.
“When we have a heatwave it’s happening more severely, because it’s on top of a warming climate,” explained Richard Betts, head of climate impacts research at the UK Met Office and professor at the University of Exeter. Betts, who has worked as a climate scientist for 33 years, added that the current event aligns with long-held warnings from the scientific community — though the speed and extremity of the record-breaking has outpaced many projections. “We’re seeing exactly the kinds of things that we were warning back then… [although] these records are perhaps more extreme and coming sooner than we had expected,” he said.
Erich Fischer, a professor at the Institute for Atmospheric and Climate Science at ETH Zurich in Switzerland, compared the breaking of climate records to breaking world records in athletic competition. “If someone beats a world record in high jump, you would expect them to beat it by one centimetre and not suddenly by 20, 30 centimetres and the same holds for the weather,” Fischer said. He noted that after 100 to 150 years of consistent temperature measurements, new records should typically break previous marks by just a tenth of a degree, not the 2 to 3 degree margins seen in many parts of Europe this week. It is the combination of rare weather systems like the current heat dome occurring on top of a rapidly warming baseline that creates such massive margins of defeat for old records, he explained.
“We’re going through a period of very rapid warming, particularly western Europe… so if the same weather events we had in, say, the 1970s [happened again], it will not only be slightly warmer, but it will simply smash the record,” Fischer added.
This week’s European heatwave is far from an isolated anomaly in 2026. Back in March, independent US climate research group Berkeley Earth reported that roughly 30% of all active US weather stations set new temperature records for that time of year, with the margins of record across the western US described by chief scientist Robert Rohde as “utterly absurd.”
These events are unfolding in a world that is already 1.2°C warmer on average than the pre-industrial late 19th century, a change driven almost entirely by human activities such as fossil fuel combustion and deforestation. Based on current global government climate policies, average global warming could reach close to 3°C by the end of the 21st century, a shift that will guarantee more frequent and more intense record-breaking heatwaves in the coming decades.
This poses unique challenges for nations like the UK and Switzerland, whose built infrastructure and housing stock were designed for a much cooler historical climate, and are not adapted to sustained extreme heat. Crucially, the current event also makes clear that extreme heat is no longer limited to the summer months, with early-season heatwaves becoming the new normal.
“The climate we are living in today is simply not the one we grew up with, and our buildings and infrastructure are woefully unprepared for what’s next,” warned Friederike Otto, a climate science professor at Imperial College London, who described the current heatwave as “absolutely astonishing.”
The UK’s own temperature history illustrates the rapid pace of change: before 1990, the all-time highest temperature recorded in the UK stood at 36.7°C, set in 1911. That record has been broken multiple times in recent decades, and now stands at 40.3°C, set during the 2022 summer heatwave. Betts warned that even higher temperatures are likely in the near future if warming continues.
“Until we reduce global carbon emissions to net zero, we’ll continue to heat the planet and temperature records will continue to be broken,” Betts said.