The loss of the body's ability to cool itself is the key differentiator between an emergent heat illness and one that is merely urgent.
The loss of the body's ability to cool itself is what BEST differentiates an emergent heat illness from one that is merely urgent. In cases of emergent heat illnesses like heat stroke, the body's mechanisms for cooling fail, leading to life-threatening conditions such as confusion, seizures, coma, and possibly death.
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