The nurse is presenting information about hyperthermia to nursing students. Which activities put a client at risk for this condition?

• A. Snowmobiling
• B. Performing strenuous activity in high humidity
• C. Skiing
• D. Hiking in cold weather

Answer: (B)

Hyperthermia happens when the body’s heat production outpaces its ability to dissipate heat. The main cooling method is sweating and its evaporation. When humidity is high, sweat doesn’t evaporate efficiently, so cooling is reduced. Strenuous activity in a hot, humid environment cranks up internal heat production while cooling is impaired, making it easy for body temperature to rise to dangerous levels and increasing the risk of heat-related illnesses like heat exhaustion or heat stroke.

In contrast, being out in cold weather—even with vigorous activity like snowmobiling, skiing, or hiking—tends to promote heat loss rather than heat gain. The risk there is usually hypothermia, not hyperthermia, because the environment facilitates cooling rather than trapping heat.