Heat Index

The heat index, also known as the “apparent temperature,” is a measure of how hot it feels to the human body when relative humidity is factored in with the actual air temperature. It takes into account the combined effects of temperature and humidity on the perception of heat stress. The heat index is particularly relevant during hot and humid weather conditions, as high humidity inhibits the body’s ability to cool itself through sweating. As a result, the perceived temperature can be significantly higher than the actual air temperature. The heat index is typically calculated using empirical formulas that incorporate temperature and relative humidity. Heat index values are often used by meteorologists to communicate the potential health risks associated with high heat and humidity, as prolonged exposure to extreme heat can lead to heat-related illnesses and heat stroke.