Which statement about dehydration risk in cold environments is true?

Which statement about dehydration risk in cold environments is true?

• A. Dehydration occurs easily in cold environments
• B. Dehydration is unlikely in cold environments
• C. Dehydration occurs only with exertion
• D. Dehydration cannot occur in cold environments

Answer: (A)

In cold environments, dehydration risk remains real because the body loses water even without sweating heavily. Dry, cold air increases insensible water loss through the lungs with each breath, and indoors or outdoors you may still perspire or sweat under exertion or protective clothing, which adds to fluid loss. Thirst cues can be blunted in the cold, so you might not drink enough, and cold-induced diuresis—the tendency to urinate more in cold conditions—can further reduce fluid status. All of this means dehydration can develop even when there isn’t obvious heat stress or heavy sweating, making the statement that dehydration occurs easily in cold environments the best choice. The other ideas underestimate the risk: dehydration is not unlikely in the cold, it isn’t confined to times of exertion, and it certainly can occur in cold settings.

In cold environments, dehydration risk remains real because the body loses water even without sweating heavily. Dry, cold air increases insensible water loss through the lungs with each breath, and indoors or outdoors you may still perspire or sweat under exertion or protective clothing, which adds to fluid loss. Thirst cues can be blunted in the cold, so you might not drink enough, and cold-induced diuresis—the tendency to urinate more in cold conditions—can further reduce fluid status. All of this means dehydration can develop even when there isn’t obvious heat stress or heavy sweating, making the statement that dehydration occurs easily in cold environments the best choice.

The other ideas underestimate the risk: dehydration is not unlikely in the cold, it isn’t confined to times of exertion, and it certainly can occur in cold settings.