When heat becomes security threat: Europe’s warning to world

Europe's struggle with unprecedented heatwaves this summer has exposed vulnerabilities in its traditionally robust crisis-response systems. Temperatures soared above 40 degrees Celsius (104 degrees Fahrenheit) in multiple countries, fueling widespread wildfires, straining healthcare systems, and causing rivers to shrink.

The human cost was staggering, with over 10,000 excess deaths recorded across 27 European nations during a late June heatwave. More than 9,000 of those who perished were over the age of 65. Scientists have concluded that such an extreme event would have been virtually impossible without human-driven climate change, marking Western Europe's hottest June on record and Europe's second warmest June overall.

This extreme heat is no longer merely an environmental concern; it is increasingly recognized as a threat to national resilience and a geopolitical challenge. The effects extend beyond rising temperatures, impacting economic activity as outdoor work becomes unsafe, straining electricity grids due to increased cooling demand, and exacerbating water shortages. Agricultural production declines, leading to potential food price increases, while hospitals are overwhelmed, diverting resources from long-term development to emergency response.

The recurring nature of these events, from disrupted transport networks and closed schools to wildfires threatening communities from Spain to Greece, signifies a shift from isolated disasters to recurring tests of national capacity. These climate-related stresses do not stop at Europe's borders, affecting global food and energy markets, disrupting supply chains, and increasing insurance costs. For vulnerable nations, prolonged drought and water scarcity can amplify existing political and economic instability, making climate stress a significant multiplier of global problems.