Europe on the boil: What is fuelling the killer heatwave?
Europe has become the world's fastest-warming continent over the past three decades.
The deadly heatwave sweeping across Europe has reportedly caused about 1,300 excess deaths between June 21 and June 28. It is the latest in a series of extreme heat events that are estimated to have claimed more than 1,50,000 lives across the continent since 2022.
This current heatwave is unfolding in June, a month typically considered part of the milder summer season across much of Western Europe. According to a June 26 report by World Weather Attribution, across France, Germany, Italy, Spain, and southern England, temperatures are reaching 5–12°C above seasonal averages, driven by a persistent high-pressure system. This pattern transports hot air from North Africa into the region while also bringing clear skies and strong sunshine, which have further intensified the heat.
WHY IS EUROPE MORE VULNERABLE NOW?
What has made this heatwave so deadly? According to a paper by the Yale Centre for Environmental Communication, a combination of factors is driving the rising death toll from extreme heat across Europe. Buildings designed to retain heat during long winters, an ageing population, and the effects of global warming are among the key reasons.
The paper adds that “the past week's European heat wave was fierce, widespread, and prolonged — a perfect storm of torrid misery and danger, particularly in France.” Schools have been closed, outdoor events cancelled, rail services disrupted, and soaring nighttime temperatures have brought little respite for residents.
FASTEST-WARMING CONTINENT
Data show that Europe has become the world's fastest-warming continent over the past three decades. Average temperatures have increased by 0.56°C per decade, more than double the global average of 0.27°C per decade.
As per a Copernicus analysis, “In 2025, almost the entire continent saw above-average annual temperatures and several northern European countries recorded their warmest or second-warmest year.”
Europe has warmed far more rapidly than the global average. Compared with pre-industrial levels (1850–1900), global temperatures have increased by about 1.4°C, while Europe has warmed by around 2.5°C. Only the Arctic has experienced faster warming, with temperatures rising by about 3.2°C, over the same period.
The data show wide variation across Europe as well. “Eastern and southeastern Europe, and parts of Central Europe including the Alps, are warming faster (0.5–1°C per decade over the last 30 years) than western and southwestern Europe and Fennoscandia (generally 0.2–0.5°C per decade),” a Copernicus analysis of European data notes.
According to the analysis, declining snow cover and reduced air pollution are among the factors contributing to Europe's faster rate of warming. As the snow cover shrinks, less solar radiation is reflected into the atmosphere, causing the land surface to absorb more heat. At the same time, lower levels of air pollution mean fewer aerosols are available to block or reflect incoming sunlight, allowing more solar radiation to reach the Earth's surface.
The deadly heatwave sweeping across Europe has reportedly caused about 1,300 excess deaths between June 21 and June 28. It is the latest in a series of extreme heat events that are estimated to have claimed more than 1,50,000 lives across the continent since 2022.
This current heatwave is unfolding in June, a month typically considered part of the milder summer season across much of Western Europe. According to a June 26 report by World Weather Attribution, across France, Germany, Italy, Spain, and southern England, temperatures are reaching 5–12°C above seasonal averages, driven by a persistent high-pressure system. This pattern transports hot air from North Africa into the region while also bringing clear skies and strong sunshine, which have further intensified the heat.
WHY IS EUROPE MORE VULNERABLE NOW?
What has made this heatwave so deadly? According to a paper by the Yale Centre for Environmental Communication, a combination of factors is driving the rising death toll from extreme heat across Europe. Buildings designed to retain heat during long winters, an ageing population, and the effects of global warming are among the key reasons.
The paper adds that “the past week's European heat wave was fierce, widespread, and prolonged — a perfect storm of torrid misery and danger, particularly in France.” Schools have been closed, outdoor events cancelled, rail services disrupted, and soaring nighttime temperatures have brought little respite for residents.
FASTEST-WARMING CONTINENT
Data show that Europe has become the world's fastest-warming continent over the past three decades. Average temperatures have increased by 0.56°C per decade, more than double the global average of 0.27°C per decade.
As per a Copernicus analysis, “In 2025, almost the entire continent saw above-average annual temperatures and several northern European countries recorded their warmest or second-warmest year.”
Europe has warmed far more rapidly than the global average. Compared with pre-industrial levels (1850–1900), global temperatures have increased by about 1.4°C, while Europe has warmed by around 2.5°C. Only the Arctic has experienced faster warming, with temperatures rising by about 3.2°C, over the same period.
The data show wide variation across Europe as well. “Eastern and southeastern Europe, and parts of Central Europe including the Alps, are warming faster (0.5–1°C per decade over the last 30 years) than western and southwestern Europe and Fennoscandia (generally 0.2–0.5°C per decade),” a Copernicus analysis of European data notes.
According to the analysis, declining snow cover and reduced air pollution are among the factors contributing to Europe's faster rate of warming. As the snow cover shrinks, less solar radiation is reflected into the atmosphere, causing the land surface to absorb more heat. At the same time, lower levels of air pollution mean fewer aerosols are available to block or reflect incoming sunlight, allowing more solar radiation to reach the Earth's surface.
