What should be done to cool someone suffering from heat exhaustion?

To effectively cool someone suffering from heat exhaustion, pouring canteen water over their head is a practical and immediate measure. This action helps lower the body temperature by facilitating evaporative cooling. When water evaporates from the skin, it takes heat away from the body, which is crucial in alleviating the symptoms of heat exhaustion, such as excessive sweating, weakness, and nausea.

This cooling method is especially beneficial because heat exhaustion occurs when the body loses too much water and salt due to prolonged exposure to high temperatures or strenuous physical activity in the heat. By wetting the body, you promote thermal regulation and support recovery.

In contrast, applying heat packs, providing warm beverages, or encouraging outdoor exercise would exacerbate the condition rather than alleviate it, as they would further increase the individual's body temperature or place additional stress on their system.