You searched for: “hyperthermy
hyperthermy (s) (noun), hyperthermies (pl)
An abnormally high body temperature: "Hyperthermia can be caused by a high fever, a heat stroke, central nervous system diseases, or infections; including, encephalitis, malaria, meningitis, sepsis, etc."

"Some hyperthermies are artificially induced by the introduction of an injection of foreign proteins or by physical means as a treatment for certain diseases."