Study projects 3.8 billion people will face extreme heat by 2050. Nature Sustainability published research indicating that if global temperatures rise 2 °C above pre‑industrial levels, the number of people exposed to dangerously high temperatures could almost double from 2010, reaching 3.79 billion. Researchers warn that tropical and equatorial regions-including India, the Philippines, Bangladesh, Laos, Brazil, Central African Republic, Nigeria and South Sudan-will experience the most severe impacts, with high energy demand for cooling. Even higher‑income temperate nations such as Canada, Russia and Finland may see more hot days and will need to adapt. The study stresses the urgency of building passive cooling and sustainable air‑conditioning infrastructure as the world approaches the 1.5 °C warming threshold. The authors call for rapid investment in adaptation measures to mitigate the “silent killer” of prolonged heat exposure, which can cause dizziness, headaches and even death.

Original article can be found here.