What is the recommended action to take if someone suffering from heat exhaustion shows symptoms?

When someone is experiencing heat exhaustion, the primary focus is to lower their body temperature and alleviate their symptoms. Allowing the person to rest in a cool environment is essential because it helps to facilitate the body's natural cooling process. A cooler environment can alleviate the stress placed on the body by excessive heat, and it also helps prevent the condition from worsening into heat stroke, which is a more severe and life-threatening condition.

This action is beneficial as it encourages hydration and allows for physical rest, both of which are critical for recovery. Cooling measures can include moving the person to shade or an air-conditioned space and using cool compresses on their skin.

The other options do not address the immediate needs of someone suffering from heat exhaustion effectively. Encouraging them to stand up can lead to further physical strain, especially if they are already feeling weak or dizzy. A warm bath would exacerbate their condition, increasing their body temperature rather than cooling it down. Lastly, offering spicy food is inappropriate, as it could increase their body temperature and make them feel more uncomfortable. Hence, resting in a cool environment is the correct and most effective choice for managing heat exhaustion.