European Heatwave Causes Over 3,700 Excess Deaths in France, Belgium and Netherlands

A devastating late-June 2026 heatwave has claimed over 3,700 excess lives across France, Belgium, and the Netherlands, with Spain reporting an additional 1,028 heat-related fatalities. Temperatures exceeding 40°C shattered records across Europe, prompting a political crisis in France where Prime Minister Sebastien Lecornu faces a no-confidence vote over his administration's response. The disaster has exposed infrastructural vulnerabilities, driving a massive surge in emergency air conditioning purchases among French citizens.

June 2025 European heatwave deaths

• ▪The Netherlands recorded approximately 480 excess deaths during the June 2026 heatwave, with the highest impact occurring in the south and east of the country
• ▪Spain's Carlos III Health Institute reported at least 1,028 heat-related deaths in June 2026, more than double the 407 deaths recorded in June 2025
• ▪A late-June 2026 heatwave caused at least 3,700 excess deaths across France, Belgium, and the Netherlands, according to preliminary official figures
• ▪Belgium registered 1,222 excess deaths between June 18 and June 29, 2026, which Belgian authorities described as an unprecedented level of excess mortality during a heatwave
• ▪France recorded 2,025 excess deaths during the June 2026 heatwave, representing an increase of approximately 29% to 30% above normal mortality figures

Temperature records across Europe

• ▪The June 20-28, 2026 heatwave sent temperatures soaring above 40°C, breaking all-time temperature records in Germany, Poland, Slovakia, the Czech Republic, and Hungary
• ▪More than two-thirds of Europe's 410-million population experienced temperatures exceeding 35°C during the June 2026 heatwave

Political fallout from heatwave

• ▪French Prime Minister Sebastien Lecornu faces a no-confidence motion filed by the Greens in parliament over his government's handling of the extreme heatwave
• ▪Belgium's Health Minister Frank Vandenbroucke tasked the country's Risk Management Group to draft recommendations to strengthen preparedness following the heatwave

Air conditioning adoption in France

• ▪On June 22, 2026, French supermarket giant Carrefour sold 30,000 air conditioning units by 6:30 p.m., which CEO Alexandre Bompard stated was a thousand times more than a normal day
• ▪The share of French households equipped with air conditioning rose from 18% in 2023 to 24% in 2025, according to the state environment agency Ademe

Elderly mortality patterns

• ▪While older populations accounted for the largest percentage of excess deaths across France, Belgium, and the Netherlands, France also saw a significant spike in deaths among people aged 45 to 64
• ▪French public health authorities reported a 91% increase in deaths at home between June 22 and June 28, 2026, compared to the previous week