Hyperthermia (hyperpyrexia), in its advanced state referred to as heat stroke or sunstroke, is an acute condition which occurs when the body produces or absorbs more heat than it can dissipate.
It is usually due to excessive exposure to heat.
The heat-regulating mechanisms of the body eventually become overwhelmed and unable to effectively deal with the heat, and body temperature climbs uncontrollably.
This is a serious medical emergency that requires immediate medical attention.
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Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Hyperthermia at Wikipedia.org. See the Wikipedia copyright page for more details. Editor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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