An estimated 2,300 people died of heat-related causes during a recent heatwave that struck Western Europe, according to a new scientific analysis released on Wednesday. The study examined the period from June 23 to July 2, during which extreme temperatures swept through 12 major European cities. Temperatures in some regions exceeded 40 degrees Celsius, triggering public health emergencies and wildfires, particularly in Spain and France.
The rapid analysis was conducted by researchers from Imperial College London and the London School of Hygiene and Tropical Medicine. Their findings indicate that around 1,500 of the total heat-related deaths were directly linked to climate change. According to the researchers, global warming significantly intensified the heatwave, with temperatures in affected cities rising up to 4 degrees Celsius higher than they would have been in the absence of climate change.
Dr. Ben Clarke, a researcher involved in the study, stated that the extreme temperatures would not have reached such dangerous levels without the influence of global warming. “Climate change has made it significantly hotter than it would have been, which in turn makes it a lot more dangerous,” he said. The study used epidemiological models and historical mortality records to estimate the impact, focusing on deaths where heat was the primary cause or a contributing factor due to the worsening of pre-existing health conditions.
New study reveals deadly impact of rising temperatures in Europe
The cities included in the analysis were Barcelona, Madrid, London, Milan, and eight others, all of which experienced marked increases in daytime and nighttime temperatures. Health systems across these urban centers were under strain as emergency services responded to heatstroke incidents and exacerbated cardiovascular and respiratory conditions. Public health advisories had been issued in several countries during the heatwave, warning vulnerable populations to stay indoors and hydrated.
The researchers emphasized the urgency of implementing climate adaptation strategies, particularly in cities where aging populations and inadequate infrastructure amplify the risks of extreme heat. They also noted that similar heatwaves will become more frequent and more severe unless substantial climate mitigation efforts are undertaken globally. The findings come as the Copernicus Climate Change Service, the European Union’s climate monitoring body, reported that June 2025 was the third-hottest June globally on record.
Only June 2024 and June 2023 were hotter, reinforcing a trend of escalating temperatures over consecutive years. The bulletin highlights the persistent impact of greenhouse gas emissions and underscores the importance of sustained international efforts to limit global warming. The study’s results serve as a stark reminder of the growing human cost of climate change, particularly in densely populated urban areas where high temperatures can be lethal. Scientists and public health experts continue to call for coordinated action to both reduce emissions and protect populations from the intensifying effects of global warming. – By EuroWire News Desk.