For millions in India, a summer day touching 35°C may sound relatively manageable, in fact, a relief given the current temperatures touching 45 degrees. In large parts of Europe, however, that same temperature is
now triggering health emergencies, infrastructure stress and even deaths. The unusually early May 2026 heatwave sweeping across the continent has already broken records in countries like the UK, France and Spain, with authorities linking multiple deaths to the extreme conditions.
Europe is struggling at temperatures that many tropical countries routinely endure due to dangerous mix of geography, infrastructure, preparedness, demographics and climate change. “While we do occasionally have warm spells in May, what we’re seeing now is unprecedented,” said Stephen Dixon, a UK Met Office spokesperson, quoted by CNN.
The unusually early heatwave sweeping across Europe has turned deadly, with France reporting at least seven heat-related deaths as temperatures crossed 35-36°C in several regions. Authorities said most fatalities were linked to drowning incidents along the Atlantic coast, particularly in areas such as Gironde, where people rushed to beaches and rivers to escape the heat, while two others reportedly suffered fatal health emergencies during sporting activities.
In the UK and Ireland too, multiple drowning deaths were reported amid record-breaking temperatures, including teenagers who went swimming in rivers, lakes and beaches during the Bank Holiday heatwave. Reports linked fatalities to locations including Lancashire, Lincolnshire and parts of Ireland, as emergency services struggled with sudden spikes in water-related accidents.
Scientists and officials say the danger was amplified because the heatwave arrived exceptionally early in May, before seasonal safety systems like lifeguards, cooling centres and public heat alerts were fully operational across many European regions
Why The Heat Is Beyond Tolerance For Europe
Much of Europe historically evolved around surviving long, cold winters rather than extreme heat. Homes are designed to trap warmth, with thick insulation, smaller windows and limited ventilation. Air conditioning is still uncommon across many countries, especially in northern and western Europe. In countries like the UK, Germany and France, many homes, schools, hospitals and public transport systems were never built for prolonged heat above 30°C.
That means when outdoor temperatures hit 35°C, indoor temperatures can remain dangerously high for hours or even days, especially during nights.
Unlike tropical countries where cooling systems, ceiling fans and heat-adapted architecture are common, European cities often turn into heat traps during heatwaves.
One major reason heat becomes deadly in Europe is the lack of cooling at night. During the current heatwave, parts of the UK recorded “tropical nights” where temperatures stayed unusually high after sunset.
Human bodies rely on cooler nights to recover from daytime heat stress. When temperatures remain elevated overnight, the heart and kidneys remain under strain for prolonged periods. This sharply increases risks for elderly people, children and those with pre-existing illnesses.
According to the World Health Organization, heat stress can rapidly worsen cardiovascular, respiratory and kidney diseases.
How Humidity Makes Things Worse
Temperature alone does not determine how deadly heat becomes. Humidity plays a critical role because the body cools itself through sweating. When humidity is high, sweat evaporates more slowly, making it harder for the body to release heat.
Scientists increasingly use “wet-bulb temperature” to assess survivability during heat events. Recent research shows dangerous heat stress can occur even below the once-theorised 35°C wet-bulb threshold. In simple terms, a humid 35°C can feel biologically far more dangerous than a dry 40°C.
This is especially relevant in parts of Europe currently experiencing warm, humid air trapped under a “heat dome” – a high-pressure system that locks hot air in place.
Europe’s Elderly Population
Europe also has one of the world’s oldest populations. Older people are physiologically less able to regulate body temperature. Many already suffer from heart disease, diabetes or respiratory illnesses, all of which worsen during heatwaves.
Heat can also interfere with medications used for blood pressure or heart conditions. Social isolation among elderly populations further increases risks because many people living alone may not recognise early symptoms of heat exhaustion.
Experts warn that older citizens are among the most vulnerable during extreme heat events.
Early Heatwaves Catch People Unprepared
This year’s heatwave arrived unusually early, in May rather than peak summer months like July or August.
Many European countries had not yet activated seasonal heat-response systems. Lifeguards were absent from some beaches, cooling centres were not fully operational and public awareness campaigns had barely begun.
Authorities say some deaths occurred during outdoor activities and swimming incidents as people rushed to escape the heat. An early heatwave also catches the human body physiologically unacclimatised. People adapt gradually to rising summer temperatures over weeks. Sudden spikes in May create sharper health shocks.
Urban Europe Is Becoming A Heat Island
European cities are increasingly suffering from the “urban heat island” effect. Concrete, asphalt, glass buildings and limited tree cover absorb heat during the day and release it slowly at night. Dense urban areas therefore remain significantly hotter than surrounding rural regions.
Cities like Paris, London and Madrid can experience severe overheating because of this effect. Public transport systems, rail lines and roads also face stress because many were designed for milder climates.
How Climate Change Is Rewriting Europe’s Summers
Scientists say climate change is making European heatwaves more frequent, more intense and longer-lasting. The current May heatwave shattered temperature records across western Europe, with some regions recording temperatures 10-15°C above normal for this time of year.
Researchers estimate climate change has already dramatically increased heat-related deaths across European cities. The 2003 European heatwave alone is estimated to have killed around 72,000 people. Since then, repeated heatwaves in 2022, 2023, 2024 and 2025 have continued exposing Europe’s vulnerability.
Why 35°C In Europe Cannot Be Compared Directly With India
Comparing temperatures across regions can be misleading because survival depends on adaptation. People in India are more accustomed to higher heat, homes are often designed with ventilation in mind, daily routines adapt around heat, and cooling devices are far more common even in lower-income settings.
Europe, by contrast, historically treated 35°C as rare. Now, with climate change pushing temperatures into unfamiliar territory, the continent is facing a harsh reality: infrastructure, healthcare systems and urban planning built for the climate of the past are struggling to cope with the climate of the future.
