Research: 2026 Summer Heatwaves Cost Europe 180 Billion Euros, May Shrink France's Economy 0.6%

The research assesses the economic impact of heat through four channels. Reduced crop yields, lower dairy output and higher food prices will weigh on the economy by about 0.15 percentage points. Constraints on nuclear, hydro and thermal power generation capacity, declining solar power efficiency and higher wholesale electricity prices will cause economic losses of about 0.12 to 0.15 percentage points. Disruptions to rail, road and water transport capacity will add a further impact of about 0.15 percentage points. The largest and most difficult-to-quantify factor is the decline in labour productivity.

The research shows that when temperatures exceed roughly 25 to 30 degrees Celsius, worker output begins to decline. Outdoor and physically demanding jobs are hit hardest, while office work is also affected because heat reduces sleep quality and cognitive ability.

The severity of heat exposure varies across countries. Spain and Italy have higher proportions of heat-exposed workers and experience more hot weather, but adaptation measures adopted over past decades have reduced the impact of individual heat events.

The research notes that the substantial human and environmental losses caused by heat are not fully captured in GDP figures. During the June 2026 heatwave alone, approximately 20,400 heat-related deaths occurred in France, Germany, Spain and Italy. Based on roughly 25,000 deaths over the summer and valued in terms of years of life lost, the economic cost is estimated at 1.5 billion to 7 billion euros.

The research concludes that adaptation measures can reduce about 40% of productivity losses but cannot eliminate the impact entirely, and notes that the estimates already use relatively conservative assumptions. Adaptation alone is insufficient to address climate risk. The European Commission's decision in July to slow the implementation of its main carbon pricing mechanism runs counter to the goal of strengthening emission reduction efforts.