hyperthermia

noun2

1. •
   The condition of having an abnormally high body temperature caused by a failure of the heat-regulating mechanisms of the body to deal with the heat coming from the environment.

   • Hyperthermia, that's just a word. The reality is different. You can't breathe. Sweating doesn't work. You're being roasted, like meat in an oven, and you can feel that. — 2020
2. •
   The therapeutic application of heat to a patient, especially as treatment to cancer.