What is the primary first aid measure for heat exhaustion?

The primary first aid measure for heat exhaustion is to rest the individual in a shaded area. This action helps to cool the body down and reduces the risk of further heat-related illnesses. When a person experiences heat exhaustion, their body has lost essential fluids and salts due to excessive sweating, and they may feel weak, dizzy, or fatigued. Providing a shaded environment allows the body to recover in a cooler space, aids in stabilizing the individual's condition, and prevents additional strain on the body.

While other measures, such as elevating the feet or providing fluids, may also be beneficial, the immediate priority is to ensure the affected individual has a chance to rest and cool down. Engaging in physical activity (like exercising) would be counterproductive, as it could exacerbate the symptoms of heat exhaustion.