Europe’s extreme heat this summer could reduce the European Union’s economic output by about 1% in 2026, effectively erasing most of the bloc’s projected growth, according to an assessment by Dutch bank Triodos Bank. The estimated hit of around €180 billion comes against a forecast of 1.1% annual GDP growth. France faces the largest estimated loss among EU economies, with heat reducing output by 1.4% and potentially contributing to an overall contraction of 0.6% this year. Poland, despite being highly exposed to the effects of individual hot days, is expected to maintain growth of around 2.9% after experiencing relatively few days above 30°C. The largest economic cost comes from lower labour productivity, with the report estimating that output falls by about 3% for each additional degree above the 30°C threshold.
The study estimates that extreme heat was associated with around 25,000 deaths, while wildfires across 434,976 hectares caused between €0.1 billion and €4.6 billion in economic damage, depending on how ecosystem losses are valued. Cooling systems can limit productivity losses by around 40%, but widespread use of air conditioning creates additional pressure on electricity grids during periods of peak demand. The report estimates that this effect could itself reduce EU GDP by 0.12–0.15%. It also warns of a potential policy feedback loop in which economic damage from extreme weather increases pressure to ease climate measures in the name of competitiveness, potentially leaving economies more exposed to future climate shocks.
Triodos argues that adaptation alone will not be sufficient and calls for faster decarbonisation and a transition to cleaner energy. At the same time, the report underscores the need for continued investment in adaptation, since atmospheric CO₂ concentrations will continue to influence temperatures even if emissions decline rapidly. The analysis adds to a growing body of research attempting to quantify the economic costs of climate-related extremes. Its central message is increasingly relevant to businesses and policymakers alike: extreme heat is moving beyond the realm of environmental risk and becoming a measurable factor in economic growth, productivity and corporate costs.
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