The danger of hypothermia is greatest for a person in which situation?

Hypothermia occurs when the body loses heat faster than it can produce it, leading to a dangerously low body temperature. The risk of hypothermia is significantly heightened when a person is immersed in cold water. Water can draw heat away from the body much more rapidly than air, especially if the water temperature is significantly lower than the body temperature. Even if the water is not freezing, prolonged exposure to cool water can lead to a rapid decrease in body temperature.

In cold water immersion, vital body heat is lost quickly, and the individual may not realize the danger until it is too late. This makes being immersed in cold water the highest risk situation for hypothermia compared to the other scenarios presented, which do not expose a person to such immediate and severe heat loss.