Europe's Late-June Heatwave Linked to Over 10,000 Excess Deaths, Data Shows

A severe heatwave that swept across Western Europe in late June was linked to more than 10,000 excess deaths, according to official data from a multinational health surveillance network. The figures underscore the significant human and economic costs associated with extreme weather events, which scientists say are becoming more frequent and intense due to climate change.

A Sharp Spike in Mortality

Data published by EuroMOMO, a network supported by the European Centre for Disease Prevention and Control and the World Health Organization, revealed a total of 10,650 excess deaths from all causes across 27 European countries during the week of June 22-28. The vast majority of these deaths, over 9,000, were among individuals aged 65 and older.

Experts noted the unusual severity of the spike for this time of year. "To have this kind of excess at this time of year is unusual. It’s really high," Lasse Vestergaard, an official at Denmark’s Statens Serum Institut which hosts EuroMOMO, told Reuters. He added that it is "difficult to explain this high excess mortality by anything but the extreme heat."

Context and Contributing Factors

The mortality data, which could be revised as more information becomes available, showed a stark contrast to previous weeks. In the eight weeks prior to the heatwave, the same group of countries had reported mortality rates that were, on average, about 500 deaths per week *below* typical levels. Scientists observed no other major contributing factors, such as significant COVID-19 outbreaks, that could account for the sudden increase.

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EuroMOMO highlighted that France and Belgium experienced "very high excess" mortality during the period. According to Belgium's public health institute, Sciensano, the country's excess mortality was the highest recorded during any heatwave since its records began in 2000.

Implications for Investors and Insurers

The data provides a quantifiable measure of the physical risks posed by climate change, a growing concern for investors and corporations. Such events place significant strain on public health systems, disrupt critical infrastructure like power grids, and can lead to increased claims for the insurance industry.

A separate study from Imperial College London and the UK Met Office, published Monday, estimated that heatwaves in May and June led to 2,700 deaths in England and Wales alone. The findings highlight the increasing need for businesses and governments to factor climate-related risks into their long-term strategic and financial planning.