Rising heat is already taking a toll on Europe’s economy, with scientists warning that economic consequences will intensify in the coming decades. Europe experienced its hottest year on record last year, and temperatures have risen twice as fast as the global average since the 1980s. As heatwaves become more frequent and severe, studies confirm growing economic impacts, especially in terms of labour productivity and GDP loss.
A pivotal study led by David García-León, published in Nature Communications, analyzed the economic damage from major heatwaves in 2003, 2010, 2015, and 2018, comparing them to historical norms from 1981 to 2010. The findings revealed that heatwaves caused economic damages ranging between 0.3% and 0.5% of Europe’s GDP in those years—1.5 to 2.5 times higher than the long-term average of about 0.2%. Without further mitigation or adaptation, projections suggest average economic losses could escalate to 0.77% of GDP by 2035–2045, 0.96% in the following decade, and exceed 1.14% by the 2060s. This alarming trend underscores the mounting GDP loss Europe faces if action is not taken.
Southern European countries are particularly at risk. Nations like Cyprus, Spain, Portugal, and Romania may face economic damages of more than 2.5% of GDP by the mid-21st century. Italy, Greece, and France are also expected to suffer significant GDP loss, largely due to their already warm climates, which make them especially vulnerable to extreme heat. In contrast, cooler regions such as the UK, Ireland, and Scandinavia are projected to experience smaller declines—though even these areas are not immune to the growing trend of heat-related economic stress.
Labour productivity is another area heavily impacted by rising temperatures. According to a 2024 OECD study covering 23 countries, including 21 in Europe, hotter days and more frequent heatwaves correlate strongly with reduced productivity. On average, 10 extra days above 35°C can lower a firm’s annual labour productivity by 0.3%. The effect becomes more severe with temperatures above 40°C, where losses can exceed 1.5%, sometimes reaching nearly 2%. Spain has already recorded the largest heat-induced productivity loss among OECD nations, followed by France and Hungary.
These losses are likely to grow. Simulations that factor in a 2°C temperature increase suggest Spain could see productivity drop by more than 0.8%, with Italy and Bulgaria also facing notable declines. Meanwhile, northern countries like Denmark and Finland are expected to see minimal impacts.
Despite some existing adaptation measures, such as adjusting work hours and instituting early warning systems, experts argue that current responses are inadequate. García-León and Hélia Costa from the OECD stress the need for enhanced climate mitigation and targeted adaptation strategies, including urban planning to reduce heat island effects, improved workplace ventilation, and regulated outdoor work during extreme heat.
As heatwaves intensify, the cost of inaction grows clearer. Without robust intervention, the economic toll—especially in terms of GDP loss—will continue to rise, threatening both national economies and European resilience as a whole.