What temperature range defines heat stroke?

• A. 98-100
• B. 101-103
• C. 104-105 or higher
• D. 96-98

Answer: (C)

Heat stroke is a life‑threatening heat illness characterized by a failure of the body's cooling mechanisms and a dangerous rise in core temperature. The defining threshold is a core body temperature of 104°F (40°C) or higher, often with central nervous system dysfunction such as confusion or altered consciousness. That’s why the option describing 104°F or higher is the best match. Temperatures well below that range are not heat stroke and are more consistent with heat exhaustion, fever, or normal body temperature. Because heat stroke can cause rapid organ damage, it requires immediate cooling and medical care.