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Related to heat hyperpyrexia: heat exhaustion
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|Noun||1.||heat hyperpyrexia - collapse caused by exposure to excessive heat|
collapse, prostration - an abrupt failure of function or complete physical exhaustion; "the commander's prostration demoralized his men"
heat exhaustion, heat prostration - a condition marked by dizziness and nausea and weakness caused by depletion of body fluids and electrolytes