When core temperature crosses the 100F line, I would say it's become "moderately serious". Other symptomatic concerns would be symptoms of heat exhaustion and moderate dehydrtation. Heat stroke I'd categorize as more than moderately serious, as I would a core temp of 101F or more. I'm assuming you actually did mean "hyperthermia" and not "hypothermia".
hyperthermia is when you have an unusually high body temperature and hypothermia is when you have a really cold body tmperature
hyperthermia
Hyperthermia is an unusually high fever.
Yang got hyperthermia.
International Journal of Hyperthermia was created in 1979.
Hyperthermia may be caused by dehydration. Other causes of hyperthermia include heat stroke, as well as certain types of prescription drugs.
what is hyperthermia
hypothermia
hyperthermia.
No
cold bath
Fever, pyrexia, hyperthermia (nouns), febrile (adjective).