This occurs when the body becomes overheated and can't cool itself properly. Symptoms may include heavy sweating, weakness, dizziness, nausea, headache, and fainting.

This is the most severe form of heat-related illness. It happens when the body's temperature regulation fails, and the body temperature rises to a dangerous level. 

High temperatures can lead to excessive sweating, causing the body to lose more water and electrolytes. This can result in dehydration. 

Also known as prickly heat, this is a skin irritation caused by excessive sweating during hot, humid weather.

High temperatures can worsen air quality, increase air pollution, and trigger respiratory symptoms or difficulties breathing in susceptible individuals.