Europe's prolonged summer heat is on track to erase a full year of economic growth for the European Union, according to new analysis from Triodos Bank. The bank estimates that the cumulative damage from extreme temperatures and wildfires will reach €180 billion in 2026, equivalent to about 1% of the bloc's GDP. With the EU's expected growth for the year hovering around 1.1%, that would leave the economy nearly stagnant.
The research breaks down the losses into four main channels, three of which are quantified as EU-wide averages. Lower crop yields and reduced dairy output, along with the resulting food price increases, account for roughly 0.15% of GDP. Constrained nuclear, hydro, and thermal generation, weaker solar efficiency, and higher wholesale power prices add another 0.12% to 0.15%. Disruptions to rail, road, and waterway capacity contribute a further 0.15%.
The largest and most difficult-to-measure impact is on labour productivity. Output per worker begins to decline once temperatures exceed roughly 25°C to 30°C, with the steepest drops in outdoor and physically demanding jobs. Office work also suffers, partly because heat degrades sleep and cognitive function. A cross-country analysis by Allianz, cited in the report, suggests that for each degree above 30°C sustained over several days, output per hour worked falls by about 3%.
France tops the exposure ranking
The results do not simply reflect which countries are hottest. Triodos scores each economy based on the share of output in exposed sectors, commute times, air conditioning penetration, and acclimatisation, then multiplies that by the number of excess hot days recorded this year. France emerges as the worst affected, with an estimated loss of 1.4 percentage points of growth—enough to push it into a contraction of about 0.6%, given its already weak starting point.
The Netherlands loses around 0.8 points, leaving it roughly flat. Spain and Italy have the most exposed workforces and the most hot days, but decades of adaptation blunt the impact of any single heatwave. Poland, with low air conditioning coverage and little acclimatisation, would be highly vulnerable, but it has experienced a cooler summer and should still grow by about 2.9%.
Human and environmental costs beyond GDP
The human toll sits largely outside these figures. An estimated 20,400 heat-related deaths occurred across France, Germany, Spain, and Italy during the June heatwave alone. Valuing the summer's roughly 25,000 deaths in terms of life years lost implies a cost of €1.5 billion to €7 billion.
Wildfires have also been devastating. By last week, over 490,000 hectares had burned across the EU, compared to a 20-year average of 197,000 hectares, according to the European Forest Fire Information System. France set a record for area burned. The loss of ecosystem services from the scorched land could add anywhere from €100 million to €4.6 billion.
The report's authors caution that their estimates rest on conservative assumptions. They suggest that adaptation measures could cut productivity losses by around 40%, but not eliminate them. They argue that adaptation alone is insufficient and that Europe needs stronger action on emissions. They point to the European Commission's decision on 17 July to ease the trajectory of its main carbon pricing scheme as the opposite approach.
As the continent grapples with the immediate effects, the longer-term implications for policy and infrastructure are becoming clearer. The findings echo concerns raised in debates about school summer breaks and the broader need to adapt to a warming climate. Meanwhile, the economic strain adds to existing pressures, such as holiday poverty that persists even as travel surges.
The research underscores a stark reality: Europe's summer heat is not just an environmental issue but a significant economic one, with the potential to undermine the bloc's growth prospects for the year. As the EU looks ahead, the balance between short-term adaptation and long-term mitigation will be critical.
