Heatwaves Are Getting Worse, But Why?

Heatwaves are no longer rare or seasonal, they’re becoming longer, deadlier, and more frequent across the globe.

In this video explainer, we break down the science behind why these extreme temperatures are spiking and what’s driving the change. Experts from the University of Exeter and the University of Washington explain how human-driven climate change, fueled by the burning of coal, oil, and gas, is the leading cause of worsening heat.

Fossil fuels release massive amounts of carbon dioxide, a potent greenhouse gas that traps heat in the atmosphere. The oceans, which have historically absorbed 90% of this excess heat, are now nearing their limit.

From Europe to the U.S., recent heatwaves have broken records and claimed thousands of lives. The impacts aren’t equal: cities suffer from “urban heat islands,” and vulnerable populations, like the elderly, outdoor workers, and children, are most at risk.

This report also touches on simple but life-saving measures, from better cooling infrastructure to changes in urban design and work schedules. As experts warn, if emissions continue unchecked, we could be facing a future where 50°C summers are the new normal.