Extreme Heat: How High Temperatures Threaten Human Health

Heat waves strain the heart, confuse the brain, and can lead to deadly organ failure.

Overview

Heatstroke, dehydration, and cardiovascular strain are the main ways heat kills.
Core body temperatures above 104°F can be fatal, with older adults at higher risk.
Humidity exacerbates the dangers by hindering the body's cooling mechanisms.
Symptoms of heat-related illness include confusion, high fever, and dehydration.
Immediate cooling measures, such as cold water immersion, are critical for survival.