What is heat stroke?

• A. A medical emergency where the body can no longer regulate temperature.
• B. A medical emergency where the body temperature spikes dangerously.
• C. A mild fever.
• D. A temporary dizziness.

Answer: (A)

Heat stroke happens when the body's cooling system stops working properly and core temperature rises to a dangerous level. This is a medical emergency because the brain and other organs can be damaged as the temperature climbs.

Core temperature in heat stroke is typically above 40°C (104°F). People may show signs such as confusion, agitation, seizures, or loss of consciousness. The skin can be very hot and dry, though in some cases it may still be sweaty if exertion was ongoing. The defining feature is the failure of the body's thermoregulation, not just a fever or a brief dizziness.

This is why the correct choice fits best: it describes a situation where the body can no longer regulate its temperature, capturing the essence of heat stroke and the urgency of treatment. By comparison, a mild fever is a regulated response to infection, and dizziness alone doesn’t indicate a dangerous failure of temperature control. If you suspect heat stroke, seek emergency help immediately and start cooling the person while waiting for responders.