Which of the following is NOT a common heat illness?

• A. Heat cramps
• B. Heat exhaustion
• C. Hypothermia
• D. Heat stroke

Answer: (C)

Heat-related illnesses arise when the body's cooling system is overwhelmed by heat and dehydration. Hypothermia, by contrast, is not a heat illness; it results from exposure to cold and a dangerous drop in body temperature, typically below 95°F (35°C). The other options are classic heat-related conditions: heat cramps are painful muscle cramps from electrolyte loss due to sweating; heat exhaustion comes from significant dehydration with symptoms like fatigue, dizziness, and faintness; heat stroke is the most severe, with a very high core temperature and possible confusion or unconsciousness, requiring emergency care. Therefore, hypothermia is the one that is not a common heat illness.