Which sign is most specific to heatstroke?

• A. Seizures
• B. Excessive sweating
• C. Hot, dry skin
• D. Rapid urination

Answer: (C)

Heatstroke happens when the body’s cooling system fails and core temperature rises high enough to impair brain function. The sign most specific to heatstroke is hot, dry skin, because sweating has often stopped, reflecting a failure of thermoregulation and dehydration that sets heatstroke apart from other heat injuries. Seizures can occur with severe heat illness, but they’re not unique to heatstroke and can appear in many conditions. Excessive sweating is more typical of earlier stages like heat exhaustion, while rapid urination isn’t a hallmark finding.