Final answer:
Heat stroke is the correct answer as it occurs when the body can no longer regulate its temperature, resulting in a medical emergency.
Step-by-step explanation:
Heat stroke has occurred when your body can no longer regulate its temperature. It is a condition where the body's core temperature rises above 104 degrees Fahrenheit (40 degrees Celsius) and is a medical emergency. Symptoms include high body temperature, rapid heartbeat, headache, dizziness, and nausea. Immediate medical attention is essential to prevent complications.
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