What is hyperthermia?

Hyperthermia refers to a condition where the body's core temperature rises significantly above the normal physiological level, which generally is around 98.6 degrees Fahrenheit. When the body temperature reaches 105 degrees or higher, it can lead to serious health complications and even be life-threatening, as the body's ability to regulate temperature becomes severely impaired.

In contrast, the other choices describe conditions that either do not fit the definition of hyperthermia or represent a normal or acceptable range of body temperature. For example, a core temperature below 95 degrees indicates hypothermia, which is the opposite condition. A temperature of 98.6 degrees is typically considered normal, and a description of temperature being "safe" does not accurately define hyperthermia, as it implies a lack of danger rather than a critical state of elevated body heat.