Heat exhaustion

Heat exhaustion is a severe form of heat illness. It is a medical emergency. Heat exhaustion is caused by the loss of water and electrolytes through sweating.

Common causes of heat exhaustion include:

Especially during physical exertion, risk factors for heat exhaustion include:

Symptoms of heat exhaustion include nausea, dizziness, irritability, headache, thirst, weakness, high body temperature, excessive sweating, and decreased urine output.

First aid for heat exhaustion includes:

If a person with heat exhaustion gets medical treatment, Emergency Medical Technicians (EMTs) or doctors and/or nurses may also:

If untreated, heat exhaustion may progress to heat stroke.