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Climate change has gone from being a distant warning to something many people are experiencing in real time. And the current heatwave sweeping across Europe is a powerful reminder of just how serious the issue has become. Europe recently endured one of its most severe early-summer heatwaves on record, an event linked to more than 1,300 excess deaths across the continent. What exactly is happening? A massive "heat dome" settled over much of the region, trapping hot air like a lid on a boiling pot and preventing cooler air from moving in. As a result, temperatures soared past 40°C in countries including Germany, Poland, the Czech Republic, and France.
Researchers say this heatwave isn't just a freak weather event. An analysis by scientists from the World Weather Attribution (WWA) consortium shows how rapidly extreme heat is worsening as carbon pollution continues to build up in the atmosphere. To put things into perspective, a heatwave like the one Europe is experiencing today would have been about 2°C cooler back in 2003. Go back even further to 1976, another infamous heatwave year, and it would have been around 3.5°C cooler. That might not sound like a huge difference, but in heatwave terms, even a degree or two can dramatically increase health risks, strain infrastructure, and push temperatures into dangerous territory. In short, today's extreme heat is being supercharged by climate change.
Dr. Theodore Keeping, an extreme weather research associate at Imperial College London and a member of the WWA team, summed up the situation in a piece for The Guardian. He explained that this is the most severe and widespread heatwave ever recorded across such a large region of Europe. According to Dr. Keeping, the planet has warmed by approximately 1.1°C over the past 50 years, and during that time the likelihood of experiencing an event like this has increased dramatically. He also noted that a heatwave of this magnitude simply wouldn't have been possible in June without climate change. And perhaps most concerning of all, he says this isn't likely to be an unusually hot summer anymore; it may increasingly become the new normal.
Extreme heat can be hazardous. Unlike hurricanes, floods, or wildfires, heatwaves don't usually leave behind dramatic images of destruction. There are no collapsed buildings or flooded streets. Instead, the danger is much quieter and often goes unnoticed until it's too late.
Yet every year, extreme heat claims thousands of lives around the world. So, what actually happens to our bodies during a heatwave? Under normal conditions, our bodies do a pretty good job of keeping us cool by sweating and increasing blood flow to the skin. But when the air around us is already scorching hot (especially when it's also humid) those natural cooling systems begin to struggle. Our bodies start gaining more heat than they can release, causing our core temperature to slowly rise. If this goes on for too long, it can lead to dehydration, heat exhaustion, heatstroke, and in the most severe cases, even death. That's why experts urge people not to underestimate extreme heat simply because it doesn't look as dangerous as other natural disasters.
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The danger becomes even greater when the heat lasts for several days in a row. Warm nights don't give our bodies enough time to recover, meaning we wake up already physically stressed before the next hot day even begins. Lachlan McIver, Health Advisor at the WHO-WMO Climate and Health Joint Office, explains that older adults, young children, pregnant women, outdoor workers, people experiencing homelessness, and those with chronic illnesses are among the most vulnerable groups. However, he also stresses that extreme heat can affect virtually anyone if temperatures remain high for long enough. That's one reason experts urge people not to underestimate heatwaves simply because they don't look as dramatic as other natural disasters.
The temperatures have become so intense that they are disrupting daily life in very noticeable ways. Around 1,000 schools across England and Wales either closed entirely or shortened the school day due to the heat. Attendance also dropped in schools that remained open, as many parents decided to keep their children at home. In France, Education Minister Édouard Geffray announced that around 13,500 schools had either closed or switched to special schedules to cope with the soaring temperatures. Across Europe, people are changing work routines, canceling outdoor activities, and looking for any way possible to stay out of the sun. The heat isn't just uncomfortable—it's becoming a major public health challenge.
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