Europe's Record Heatwave
Western Europe Sets Hottest June Record in 2026, Causing Power Outages and Global Ocean Warmth
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Key Points
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In northwest Brittany, the heatwave triggered mass electricity outages as the grid buckled, prompting emergency interventions to restore power, while UK rail operators imposed speed restrictions on certain axes to prevent derailments caused by heat-related rail dilation.
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The extreme dryness also sparked wildfires in the UK’s Peak District, underscoring the wildfire risk that accompanies prolonged heat and drought conditions.
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Global ocean temperatures reached record highs, with extra-polar oceans hitting about 20.86°C—the hottest on record—adding to the evidence of persistent, system-wide warming beyond land surfaces.
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Canary Islands data show a very warm June as well, with an average of 20.5°C—the warmest since 1961—and stations such as Gran Canaria recording a 39°C max, among 78 locations hitting 30°C or higher.
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Globally, June 2026 averaged 16.54°C, the second warmest on record, while Western Europe posted a June average of about 20.74°C—3.05°C above the 1991–2020 baseline—reflecting a continued pattern of extreme heat.
Western Europe just had its hottest June ever recorded. The EU's Copernicus climate monitoring service found that surface air temperatures across the region ran 3.06°C above the 1991–2020 average — pushing the monthly mean to roughly 20.74°C, according to The Guardian.
Globally, June 2026 averaged 16.54°C, making it the second warmest June on record, Yahoo News reported. The heat came as the UK entered its third heatwave of the year, with wildfires, power outages, and rail disruptions spreading across the continent.
Temperatures Shattered Records Across Multiple Countries
France bore some of the most extreme readings. Pissos, in southwestern France, hit 44.3°C — one of the highest daily highs recorded anywhere on the continent that month. Multiple countries across western Europe posted their own June records during the same period, according to The Guardian.
The Canary Islands also felt the heat. June averaged 20.5°C across the archipelago — the warmest since 1961. Gran Canaria recorded a peak of 39°C, and 78 weather stations logged highs of 30°C or above, Gazette Life reported. La Gomera hit 37°C on June 30, the hottest day of the month for the island chain.
Power Grids Buckled and Rail Lines Slowed Under the Heat
In northwest Brittany, the power grid couldn't keep up. The heatwave triggered mass electricity outages as demand surged and infrastructure strained. Emergency crews moved in to restore power, The Guardian reported.
In the UK, rail operators imposed speed restrictions on key lines. Heat causes metal rails to expand and warp — a process called heat-related dilation — which can derail trains if speeds aren't cut. Transport slowdowns added to the disruption for millions of commuters, according to Head Topics.
Wildfires Broke Out as Drought Gripped the UK
The heat didn't just stress infrastructure — it also dried out the land. Wildfires broke out in the UK's Peak District, a national park in northern England. Prolonged heat with little rainfall turned vegetation into tinder, Head Topics reported.
The UK was entering its third heatwave of 2026 as the Copernicus data was released. That pattern — multiple heatwaves in a single summer — reflects what climate scientists say is a growing trend of more frequent and more intense heat events across Europe.
Oceans Hit Record Warmth, Adding to a Broader Warning
The heat wasn't limited to land. Extra-polar ocean temperatures reached approximately 20.86°C in June — the hottest on record for the world's seas outside the polar regions. Warm oceans fuel more intense storms and heatwaves, making them a key indicator of the planet's overall warming, according to The Guardian.
Copernicus placed June 2026 within a clear and continuing trend. Heatwaves are getting more frequent, more intense, and longer. Cities, ecosystems, and energy systems are all under growing strain — and Europe's record-breaking June is the latest evidence of that shift, Yahoo News reported.
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