Key Takeaways
- A Saharan heat dome is to blame. A dome of high pressure dragged scorching air north from North Africa and parked it over Western Europe, with the heat peaking between 20 and 23 June 2026.
- Iberia is the hottest. Spain and Portugal pushed toward 44°C (111°F), with 42.7°C (109°F) recorded at Pinhão (Portugal) and Andújar (Spain) on 21 June — the heatwave’s highest readings.
- France went on red alert. Highs of 40–44°C (104 to 111°F) put 49 of 96 mainland departments under the top heat warning; hundreds of schools closed or cut hours.
- The UK broke its June record. Around 38°C (100°F) beat the 35.6°C (96°F) set in Southampton in 1976 — the hottest June day ever recorded in the United Kingdom.
- Deadly and disruptive. Heat-related deaths, wildfire alerts across France and Iberia, and heat-stressed power grids (blackouts in Turin) followed the spike.
An exceptionally early and intense heatwave swept across Europe in the days around the 2026 summer solstice, sending temperatures 14–18°C (25 to 32°F) above normal for late June and breaking long-standing records. A stagnant heat dome — a sprawling area of high pressure feeding on hot Saharan air — settled over the continent, with the most brutal heat concentrated over the Iberian Peninsula and France between 20 and 23 June.
The map below shows the peak daytime highs reached during the heatwave. The gradient tells the story of the heat dome itself: a blast-furnace core over Spain, Portugal and France, then spreading east into Germany, Poland and central Europe later in the month, while barely touching the cooler Nordic and Baltic fringe.
Explore the heatwave, city by city
The static map above shows the peak. The interactive version below lets you explore it city by city. Tap any marker for that city’s peak temperature and whether it set a record, with the colour scaling from amber to deep red as the heat climbs.
The human toll: heatwave deaths across Europe
Update, 29 June 2026: the heatwave is now breaking down. Cooler Atlantic air and thunderstorms are pushing in from the west, ending the heat across Spain, France and the Benelux, with the last hot spots over Germany, Poland and the Balkans expected to clear by around 1 July. The human cost is coming into focus: the World Health Organization estimates more than 1,300 excess deaths across Europe since 21 June, including around 1,000 in France and 327 heat-attributed deaths in Spain. Officials caution that heat deaths are undercounted at first, so the totals will keep rising as excess-mortality data firms up.
Update, 28 June 2026: the heatwave has peaked and is easing in the west, but it has left a heavy toll. France’s public-health agency reports around 1,000 excess deaths during the peak, mostly among people over 65 in red-alert areas. Records fell as the heat reached its climax: Germany set a provisional national record of 41.3°C (106°F) near Saarbrücken on 27 June, France hit its hottest June day on record at 43.3°C (110°F), and the United Kingdom reached a new June record of 37.1°C (99°F) at Cavendish in Suffolk. Wildfires have flared in eastern Germany and across the Mediterranean as the dried-out landscape ignites.
Update, 27 June 2026: the heatwave has pushed deep into central and eastern Europe. Germany has breached 40°C (104°F), with peaks near 41°C and some autobahns buckling in the heat, and Poland and the Balkans are next in line as the World Meteorological Organization warns the heat dome will keep shifting east. The United Kingdom logged a fresh June record of 36.9°C (98°F), and Italy has confirmed at least five heat-related deaths, including two farm workers and a homeless man. Across western Europe, dozens of deaths have now been linked to the heat.
Update, 25 June 2026: the heat dome, a stubborn “Omega block,” is now shifting east and intensifying. Germany is forecast to reach about 41°C (106°F) on Friday and Saturday after hitting 38°C (100°F), Italy has placed its highest-level heat alert on 16 cities including Rome, Milan, Florence, Turin and Verona, and Austria is bracing for more. The United Kingdom has confirmed its hottest June day on record. In France the heat is now linked to around 50 deaths, most of them drownings as people sought relief in rivers and lakes.
Update, 24 June 2026: the heatwave has turned deadly. The night of 22–23 June was France’s hottest since 1947, red alerts remain in force across France, Spain, Italy and the UK, and the World Health Organization has called the event a “health emergency,” estimating that heat has killed roughly 200,000 people in Europe over the past four years. Official death tolls always lag — full excess-mortality counts emerge weeks later — but here is what national authorities and media have confirmed so far.
| Country | Deaths reported so far | Details (as of 29 June 2026) |
|---|---|---|
| 🇪🇺 Europe-wide (WHO) | 1,300+ | WHO estimate of excess deaths across Europe since 21 June 2026; modeled excess mortality, not all formally classified as heat-caused |
| 🇫🇷 France | ~1,000 | About 1,000 excess deaths during the peak, mostly people over 65 in red-alert areas, per France’s public-health agency, plus around 48 drownings |
| 🇪🇸 Spain | 327 | 327 heat-attributed deaths since 21 June (Spain’s MoMo daily-mortality monitoring), on top of a record 101 in May. Peaked at 45.1°C (113°F) in Andújar |
| 🇬🇧 United Kingdom | ~25 | Around 25 water- and heat-related deaths; a new June record of 37.1°C (99°F) was recorded at Cavendish, Suffolk |
| 🇮🇹 Italy | At least 5 | Confirmed heat-related deaths including two farm workers and a homeless man; highest-level alert on 16+ cities as the dome shifts east |
| 🇩🇪 Germany | Dozens | Dozens of deaths linked to the heat; a provisional national record of 41.3°C (106°F) was set near Saarbrücken on 27 June |
| 🇵🇹 Portugal | Not yet tallied | Under heat warnings; authorities are monitoring excess mortality |
A few caveats matter. These are preliminary figures that will almost certainly be revised upward as official excess-mortality data comes in. And the causes differ: most of France’s deaths are drownings — people getting into difficulty while trying to cool off — rather than classic heatstroke, while Spain’s 101 is a heat-attributed total for May, before this latest spike. For scale, France alone averages around 5,400 heat deaths a year, and the deadly summer of 2003 killed an estimated 70,000 people across Europe.
A heat dome over Western Europe
The driver was a powerful upper-level ridge building northward out of northwest Africa, creating a classic heat dome: sinking air under high pressure compresses and warms, skies stay cloudless, and the ground bakes day after day. Because the system was so stagnant, heat accumulated rather than dispersing — each day started warmer than the last, and nights offered little relief. Forecasters flagged Monday 22 June as the likely peak of the “brutal” heat before the ridge slowly shifted.
Where it was hottest
🇪🇸 Spain and 🇵🇹 Portugal sat under the core of the dome. Both countries were forecast to approach 44–45°C (111 to 113°F), and on 21 June the mercury hit 42.7°C (109°F) at Pinhão in Portugal’s Douro valley and at Andújar in southern Spain — the highest confirmed readings of the event. Seville and Córdoba were among the worst-hit Spanish cities.
🇫🇷 France baked in 40–44°C (104 to 111°F) heat, with the Rhône valley and the southwest hottest. 🇮🇹 Italy’s northern plains climbed into the low 40s°C (around 105°F), while 🇩🇪 Germany reached the high 30s°C (around 100°F) in the south. Further from the core, 🇬🇧 the UK and 🇮🇪 Ireland stayed cooler but still unusually hot, and the 🇸🇪 Nordic and Baltic countries largely escaped, topping out in the high 20s°C (low-to-mid 80s°F).
Records tumbling
The most striking record came from the United Kingdom, where the Met Office confirmed a new record for the hottest June day ever, with around 38°C (100°F) beating the previous mark of 35.6°C (96°F) set in Southampton in 1976. Across the continent, the event stood out less for any single all-time high than for its timing and breadth: heat of this intensity is more typical of late July or August, not the third week of June. In Austria, GeoSphere stations logged up to 36.6°C (98°F) at Bad Deutsch-Altenburg on 21 June.
Red alerts, wildfires and health
France placed 49 of its 96 mainland departments under a red alert — the highest level — and closed or shortened the day at hundreds of schools. Italy issued red warnings for cities including Rome, Florence, Bologna and Turin, where heat-stressed underground cables triggered repeated blackouts. Emergency services and military units across France and Iberia were placed on wildfire alert as the heat dried out vegetation, and authorities reported a rising toll of heat-related deaths. The prolonged heat also deepened drought conditions heading into summer.
Why these heatwaves keep coming earlier
Europe is the fastest-warming continent, heating at roughly twice the global average. As the baseline climate warms, the same weather patterns that have always brought summer heat now deliver more extreme spikes — and they arrive earlier in the season. Meteorologists pointed to climate change as a clear contributing factor in the unusually early onset of this heatwave. Events that were once rare are becoming a near-annual feature of European summers, with serious implications for health, agriculture, energy demand and the wildfire season.
For the latest forecasts and warnings, always check your national weather service — and during a heatwave, stay hydrated, avoid the midday sun, and check on elderly neighbours and anyone living alone.
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