Which statement is true about heat stress?

Which statement is true about heat stress?

• A. Lack of sweat is a symptom of heat stroke.
• B. Rapid heartbeat indicates dehydration only.
• C. Heat stroke is not dangerous if cooled immediately.
• D. Sweating is always intense in heat stroke.

Answer: (A)

When heat stress progresses to heat stroke, the body's ability to cool itself can fail and sweating may stop, leaving the skin dry. This absence of sweat is a warning sign that the body's cooling system has broken down, which makes heat stroke a medical emergency requiring immediate cooling and professional care.

Sweating being intense in heat stroke is not guaranteed, since the body's sweating response can be impaired. Rapid heartbeat can occur with heat stress but is not exclusive to dehydration, and cooling promptly is critical but does not by itself make heat stroke safe. The statement that heat stroke isn’t dangerous if cooled immediately isn’t accurate—even with rapid cooling, heat stroke can cause serious harm if not treated promptly.