Why Delhi Feels as Hot as 51°C: The Science of Wet-Bulb Temperature

Delhi is currently experiencing extreme heat conditions that feel far more intense than the actual recorded temperature. The perceived heat index has reached around 51 degrees Celsius, even though thermometers show lower readings. This phenomenon is explained by a meteorological measure known as wet-bulb temperature, which accounts for both heat and humidity together. Unlike dry-bulb temperature, wet-bulb temperature reflects how effectively the human body can cool itself through sweating. High humidity levels reduce the body's ability to dissipate heat, making conditions feel significantly hotter than they actually are.