Which statement about hypothermia thresholds is correct?

• A. Hypothermia occurs when core temp is below 35C
• B. Hypothermia occurs when core temp is above 35C
• C. Hypothermia occurs when core temp is below 32C
• D. Hypothermia occurs only in water below 35C

Answer: (A)

Hypothermia begins when the body's core temperature drops below 35°C. This threshold is what clinicians and responders use to signal the onset of hypothermia and to initiate warming and protective measures. Temperatures from about 32°C to 35°C are considered mild hypothermia, with colder ranges indicating moderate or severe hypothermia. The idea that hypothermia occurs only in water is incorrect because cold air exposure can also cause hypothermia in the right conditions. Likewise, temperatures above 35°C are not hypothermia, and saying it only involves water below 35°C ignores cold-air scenarios and the general definition.