The ‘silent killer’: what you need to know about heatwaves

The Guardian22 jun 2026Macro
Automatisch samengesteld met AI uit de vermelde bronnen

Hot weather kills an estimated half a million people each year—more than from wars or terrorism but fewer than from cars or air pollution—with most deaths indirect through exacerbation of heart, lung, and kidney disease. Warm nights compound the damage; Spain now informally labels nights above 30°C “hellish.” Outdoor workers, the elderly, women, and poor households without cooling or green space face the highest risk. Humidity amplifies perceived temperatures, and climate change has raised the global baseline by 1.3°C while weakening the jet stream, making heat domes more frequent. This year the UK’s Climate Change Committee recommended that air conditioning be installed in all care homes.