Hypehermia is defined as-

Hypehermia is increase in the body temperature to abnormal level despite of normal hypothalamic functions The body temperature may be over 105 F, a level that damages the brain and other organs. Other symptoms include muscle cramps, fatigue, dizziness, headache, nausea, vomiting, and weakness. The hea rate may be elevated, and the skin is reddened Ref Davidson 23rd edition pg 1287