Heat Exhaustion and Heat Stroke Topic Guide

Heat Exhaustion and Heat Stroke: Heat exhaustion occurs when individuals exercise, work, or play in a hot, humid environment and fluids are lost through sweating, which causes dehydration and overheating of the body. Symptoms of heat exhaustion include pale, cool, moist skin; profuse sweating; muscle pains or cramps; dizziness; headache; elevated temperature. Heat stroke occurs when a person's cooling system stops working and the internal body temperature rises to 105 F or greater. Symptoms of heat stroke include unconsciousness; hot, flushed, dry skin; elevated blood pressure; hyperventilating; a core body temperature of 105 F or greater. Heat stroke is a life-threatening emergency.

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Dehydration (Adults) Dehydration occurs when the loss of body fluids (mostly water), exceeds the amount that is taken in. Causes of dehydration include fever, vomiting, diarrhea, diseases (diabetes), impaired ability to drink, lack of access to safe drinking water, and injuries to the skin. Common symptoms of dehydration include dizziness, dry skin, headache, low urine output, tiredness, sleepiness, dry mouth, and increased thirst. Treatment of dehydration depends upon the severity of the condition.