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medical : a serious condition that happens when someone has been in high temperatures for a long time and that causes a person to stop sweating, have a very high body temperature, and become exhausted or unconscious
Full Definition of HEATSTROKE
: a condition marked especially by cessation of sweating, extremely high body temperature, and collapse that results from prolonged exposure to high temperature — compare heat exhaustion
: a condition marked especially by cessation of sweating, extremely high body temperature, and collapse that results from prolonged exposure to high temperature—compare heat exhaustion
Debility caused by exposure to heat and humidity, usually for many hours, called sunstroke when caused by direct sunlight. Body temperature is 106–110°F (41–43°C) or higher. Perspiration almost stops, leading to the rapid temperature rise, collapse, and coma. Cooling with ice-water baths or packs, with massage to promote circulation, is urgent to save the victim's life. Even after body temperature drops, circulatory disorder and brain damage may cause death. See alsoheat exhaustion.