What is the first step in treating a passenger experiencing heat stroke?

The first step in treating a passenger experiencing heat stroke is to cool the body immediately. Heat stroke is a severe condition that occurs when the body overheats, often due to prolonged exposure to high temperatures or strenuous activity in the heat. Immediate action is crucial because heat stroke can lead to serious complications, including organ damage and death.

By cooling the body as swiftly as possible, you can help lower the person's core temperature, which is vital for preventing further health deterioration. This can be achieved through various methods, such as applying cool water, using ice packs, or moving the person to a cooler environment.

While other options, such as loosening tight clothing and using fans, may help in the overall management of heat exhaustion or aid in cooling down someone, they are not as effective as cooling the body right away. The priority should always be to reduce the body’s temperature quickly to mitigate the risks associated with heat stroke.