Heatwaves in Europe have become a recurring headline for several consecutive years, indicating that the “Old Continent” is entering a different climatic zone.

Data from the European Copernicus Observatory and the World Meteorological Organization show that Europe is the fastest-warming continent in the world, with temperatures rising more than twice the global average. Warming has reached about 2.5°C compared to the pre-industrial era, while global warming stands at roughly 1.4°C.

Why Europe specifically?

The main hypothesis presented by climate science is clear: heatwaves are no longer the result of temporary “bad weather” or a passing air mass. The Copernicus Observatory refers to a phenomenon known as atmospheric blocking and jet stream behavior. The jet stream is a band of strong winds that moves from west to east in the upper layers of the atmosphere and is responsible for steering weather systems in the Northern Hemisphere.

Due to global warming, this current tends in summer to split into two branches or slow down, becoming wavy and stagnant. This behavior creates a persistent high pressure zone over Europe, forming a heat dome that traps hot air coming from North Africa and prevents cooler, rainy air masses from entering.

As a result, the ground heats up during the day and does not cool down sufficiently at night. This mechanism is not new, so what has changed? The answer is simple in both logical and scientific terms: the heat dome is operating on an already warmer climatic baseline.

The second reason is the retreat of snow and ice, a phenomenon climate scientists call Arctic amplification. The Arctic, on the doorstep of northern Europe, is warming four times faster than the rest of the world. This rapid polar warming reduces the temperature difference between the equator and the pole. This difference is the main driver of global wind strength. When it weakens, Europe’s summer weather systems tend to become “stuck” for long periods, turning a heatwave from a two-day event into two weeks of continuous hardship.

In addition, the melting of snow cover in the Alps, northern Europe, and European polar regions has reduced the Earth’s ability to reflect sunlight. White snow reflects radiation, whereas bare ground and exposed water absorb it.

French people cool off in the waters of the Saint-Martin Canal due to the heatwave hitting France, 25 June 2026. (AFP)

The third reason is improved air quality. In recent decades, Europe has significantly reduced air pollutants and fine particulate matter that used to reflect part of the sun’s rays back into space. This is an important environmental and public health achievement, as it has saved many lives and reduced respiratory diseases.

However, it has also removed part of the “cooling mask” that previously masked some of the warming caused by greenhouse gases. In other words, Europe has cleaned its air, but the world has not stopped emitting greenhouse gases, so the warming has become more visible.

The fourth reason is the Mediterranean Sea. This semi-enclosed sea is warming rapidly, and as its surface temperature rises, the amount of water vapor in the air increases. Hot, humid air is more dangerous for the human body than hot, dry air, because sweating becomes less effective. That is why hot nights, or “tropical nights,” with temperatures above 20°C are considered a serious health threat rather than just a minor discomfort.

What does climate science predict for Europe’s future?

There is no avoiding the conclusion that a return to the summers of the 20th century in Europe is impossible. Even if global warming is limited, heatwaves will remain more frequent and more intense than before. If emissions continue, what we consider an exceptional heatwave today will become a far more common event.

The difference between a 1.5°C world and a 2°C or 3°C world is not just a number. It translates into lost working days, additional deaths, burned crops, and nights in which people cannot sleep.

A woman shelters under a tree on a hot day in the old town square in Prague, Czech Republic, 27 June 2026. (AFP)

In addition, the European summer has begun to expand at the expense of spring and autumn. It is no longer limited to July and August; intense heatwaves now start in June and can extend through September.

However, climate science does not say that disaster is inevitable. There are two necessary paths that must go together: mitigation and adaptation. Mitigation means rapidly reducing emissions and stopping the construction of a global economy based on burning coal, oil, and gas as if the atmosphere were a free waste dump.

Adaptation means redesigning cities for life in a hotter climate: more trees and shade, reflective surfaces, better thermal insulation, public cooling centers, early warning systems, adjusted working hours, protection for the elderly, and serious investment in infrastructure that does not collapse at the first heatwave.

Find out more about Europe’s heatwaves below:

• Europe’s changing summer: When heat redraws the tourism map

• France in the heat crisis: When Chirac’s warning becomes reality again

• Europe under heat: Climate change as a geopolitical and economic stress test