Extreme summers cost Europe 0.3% of output in 2025, with losses set to hit 0.8% by 2029, as heatwaves and wildfires disrupt agriculture, insurance and budgets.
Europe's string of extreme summers has become a measurable economic drag, with heatwaves, wildfires, and droughts costing the region 0.3% of output in 2025, according to a joint paper from the University of Mannheim and the European Central Bank. The damage could accumulate to 0.8% by 2029, driven by lost productivity, supply chain disruption, and depressed tourism revenue.
Western Europe recorded its hottest June ever this year, the World Meteorological Organization said. France and Spain have seen wildfires burn 300,000 acres and force the evacuation of 300,000 people. French Finance Minister Roland Lescure called the fires "like a clap of thunder" for the local economy.
"This is really a big economic challenge," Georg Zachmann, a senior fellow at Bruegel who focuses on energy and climate, told CNBC. He said extreme weather events hit fiscal budgets through evacuation costs, firefighting, and infrastructure recovery. He cited the 2025 California fires, which cost an estimated $40 billion to $60 billion in direct damages and $300 billion in indirect costs.
Zachmann added that disasters arriving at random patterns push up inflation. "The prices substantially increase. The risk premium increases for people that want to build there in the future," he said.
Carsten Brzeski, global head of macro at ING, said heatwaves have "quietly graduated from 'weather event' to 'macro variable.'" He noted that reconstruction after wildfires can generate positive economic activity, calling it a "bittersweet consequence."
Agricultural commodities are among the most exposed asset classes. Cocoa, coffee, and wheat face yield losses as warmer and more volatile weather drives up food prices, the ECB paper and WMO report noted.
Insurance companies paid out $56.3 billion in wildfire losses during the 2010s, six times the $8.7 billion paid in the 2000s, according to a June report from Allianz Commercial. The hardest-hit sectors include utilities, energy, real estate, construction, agriculture, and transportation.
Western Europe is facing its third heatwave in six weeks, raising the risk of further wildfires. Stefan Doerr, a professor of wildland fire science at Swansea University, said climate change and poor landscape management are playing a "major role." Decades of agricultural land abandonment and centuries of human-shaped landscapes have left parts of southern Europe with dense, highly flammable vegetation, he told CNBC.
"If we had a natural landscape, we would have actually, in some places, at least far less flammable forests," Doerr said. "This is man-made. It's not that the plants are not natural, but the way the landscape looks now is entirely artificial."
Brzeski said Europe needs to adapt systems quickly and slow the pace of climate change to avoid exceeding the economy's "absorptive capacity" for such risks. The ECB paper projects that without adaptation, the cumulative output loss could reach 0.8% by 2029, turning summer weather into a recurring macroeconomic variable.
The WMO report noted that Europe has "seen increased wildfire potential … with a growing number of larger fires and an extended fire season." With temperatures continuing to rise, the economic toll is set to grow.
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