How much did temperatures rise?
Some of the largest increases and record temperatures include:
United Kingdom: 37.7°C (highest June temperature ever recorded), about 2.1°C above the previous June record.
Germany: Up to 41.7°C, with record-breaking hot days and nights.
France: Many places exceeded 40°C.
Hungary: Around 42°C, an all-time national record.
Netherlands: 39.4°C, a new June record.
When did it begin?
The most intense phase began around 20–22 June 2026, intensified through 24–30 June, and continued into early July 2026.
Why did temperatures suddenly increase?
Meteorologists point to several factors acting together:
A persistent high-pressure "heat dome" (Omega block) trapped hot air over Europe.
Very hot, dry air moved northward from North Africa.
Dry soils reduced evaporative cooling, allowing temperatures to rise even further.
Long-term human-caused climate change increased the intensity and likelihood of such extreme heat events. Europe is warming faster than the global average.
What are experts saying?
Organizations such as the World Meteorological Organization and climate scientists state that:
This is one of the most severe heatwaves ever recorded in Europe.
Climate change made this event far more likely and more intense.
Heatwaves of this kind are expected to become more frequent, longer-lasting, and hotter in the future unless global greenhouse gas emissions are significantly reduced.
The heatwave has also led to widespread health emergencies, wildfires, transport disruptions, and thousands of excess deaths, particularly in France.
The temperatures were extraordinary because they rose well above what is normal for late June and early July, in many cases within just a few days.
Location Normal late June/early July Peak during heatwave Difference
France (Paris) 24–26°C 38–41°C +13 to +16°C
United Kingdom (London/Southeast) 21–24°C 34–38°C +10 to +15°C
Germany (Berlin) 23–26°C 37–41°C +12 to +16°C
Spain (Madrid) 32–34°C 42–46°C +8 to +12°C
Italy (Rome) 30–32°C 39–42°C +8 to +10°C
Netherlands 21–23°C 35–39°C +13 to +17°C
How sudden was the change?
In several regions, temperatures increased 10–15°C within about 3–5 days. For example:
Around 22 June: Many places in northern Europe had daytime temperatures around 22–25°C.
By 26–28 June: The same places were experiencing 35–40°C.
Night temperatures also remained unusually high, often staying above 25°C, whereas normal nights would cool to 12–17°C. This lack of nighttime cooling greatly increased health risks.
Why can temperatures rise so quickly?
Experts explain that a combination of:
a strong heat dome (persistent high-pressure system),
hot air flowing north from the Sahara,
clear skies with intense sunshine,
and very dry ground
allowed temperatures to climb rapidly over just a few days. Long-term climate change made this event significantly more likely and more intense.
A rise of 10–15°C in less than a week is unusual for Europe and is why meteorologists classified this as an exceptional heatwave rather than ordinary summer weather.
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