Staying in the heat outdoors for long hours can lead to hyperthermia or overheating. And no, it is not a fever. Here are some illnesses concerning it: - Heat cramps - Heat exhaustion - Heat rash - Heat stress - Heat stroke People are at risk of hyperthermia if they are below four or above 65 years old, experiencing dehydration and electrolyte imbalance, wearing tight or thick clothing, and working and straining under hot and humid weather.
