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heat exhaustion

heat exhaustion, condition caused by overexposure to sunlight or another heat source and resulting in dehydration and salt depletion, also known as heat prostration. The symptoms are severe headaches, weakness, dizziness, blurred vision, and sometimes unconsciousness. However, the body temperature is not elevated as in heatstroke. The condition is usually temporary and rarely fatal. Water, mineral, and ion depletion may be so severe that painful spasms of the muscles, commonly called heat cramps, occur. Treatment includes administering a supplemental solution to replace the water, minerals, and ions that have been depleted from the body. See first aid.

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heat exhaustion

heat ex·haus·tion (also heat pros·tra·tion) • n. a condition caused by prolonged exposure to heat during activity and characterized by weakness, profuse sweating, dizziness, and nausea. Also called heat prostration.

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heat exhaustion

heat exhaustion (heet) n. fatigue and collapse due to the low blood pressure and blood volume that result from loss of body fluids and salts after prolonged or unaccustomed exposure to heat.

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