While carrying passengers on a tourist bus you notice smoke coming out from the engine compartment. Which of the following actions should you take immediately after stopping the vehicle?

Smoke coming from the engine compartment indicates a direct threat of fire, which poses a fatal danger to passengers. The driver's overriding duty in a hazardous situation is to protect the life and health of the people being transported. Therefore, immediate evacuation is the priority action, which must be taken before any attempt to extinguish the vehicle or call for help.