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Hydration and cooling off are critical responses to signs of heat exhaustion because this condition occurs when the body loses an excessive amount of water and electrolytes. Signs of heat exhaustion can include heavy sweating, weakness, dizziness, headache, and nausea. By rehydrating with fluids, preferably those containing electrolytes, the body can begin to restore the essential fluids it has lost. Cooling off is equally important as it helps to lower the body temperature, which can be elevated due to overheating. This may involve moving the affected person to a cooler environment, applying cool, damp cloths to the skin, or using a fan.

In contrast, engaging in immediate physical activity can aggravate the symptoms and lead to more severe conditions like heat stroke. Increased exposure to heat would also exacerbate the body’s inability to cool down and worsen the situation. Lastly, taking pain medication does not address the underlying issues related to hydration and overheating, and may mask symptoms rather than provide necessary relief. Overall, hydration and cooling measures are the first-line responses to effectively manage heat exhaustion.