“Heatstroke” and “Heatstrokes” redirect here. For the film, see Heatstroke (film). For the song by Krokus, see Metal Rendez-vous. Heat stroke (also known as heatstroke, sun stroke or sunstroke) is a severe heat illness, defined as hyperthermia with a body temperature greater than due to environmental heat exposure with lack of thermoregulation. This is distinct from a fever, where there is a physiological increase in the temperature set point of the body. The term “stroke” in “heat stroke” is a misnomer in that it does not involve a blockage or hemorrhage of blood flow to the brain. Treatment requires rapid physical cooling of the body.
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