What action should be taken if a survivor exhibits signs of heat exhaustion?

Moving to a cooler environment and rehydrating is the appropriate action when a survivor exhibits signs of heat exhaustion. Heat exhaustion occurs when the body becomes dehydrated and overheated, often due to prolonged exposure to high temperatures or strenuous physical activity.

By relocating the individual to a cooler environment, you help reduce their body temperature and mitigate further heat stress. Additionally, encouraging hydration, preferably with electrolyte solutions or water, is vital to replenish lost fluids and help the body recover. This dual approach tackles both the immediate symptoms and addresses the underlying causes of heat exhaustion.

The other options would either worsen the survivor's condition or fail to provide appropriate care; thus, they do not support effective recovery from heat-related illnesses.