Heat exhaustion

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

Signs and symptoms[edit]

Symptoms of heat exhaustion include nausea, dizziness, irritability, headache, thirst, weakness, high body temperature, excessive sweating, and decreased urine output.[1]


First aid for heat exhaustion involves moving the affected person to a cool environment and administering cold liquids.[1]


If untreated, heat exhaustion may progress to heat stroke.[1]


  1. ^ a b c Jacklitsch, Brenda L. (June 29, 2011). "Summer Heat Can Be Deadly for Outdoor Workers". NIOSH: Workplace Safety and Health. Medscape and NIOSH.