Heat waves have killed millions. Here’s how scientists tally lives lost0

• SCIENCE, Science / Health, Science Mission Directorate, scientists, Space, Space Communications & Navigation Program, Space Launch System (SLS), Space Telescope, space-x-ipo, SpaceX
• August 7, 2026

A paramedic moves a person to an ambulance in Spain during a 2022 heatwave that killed more than 300 people in five days. Credit: Angel Garcia/Bloomberg/Getty Extreme heat is killing hundreds of thousands of people every year — and the annual toll is growing. An estimated 210,000 more people died of heat-related causes each year