What is the first step you should take if your vehicle catches fire in a tunnel?

The first step you should take if your vehicle catches fire in a tunnel is to switch on the hazard warning lights. Activating the hazard lights serves a critical purpose in alerting other drivers that there is a dangerous situation unfolding, which can help prevent further accidents. Additionally, it can aid emergency responders in locating your vehicle more easily when they arrive on the scene.

If a vehicle catches fire, it is essential to communicate the emergency to other road users and authorities promptly, ensuring everyone's safety. The other options may not provide the necessary immediate action for safety. Exiting the vehicle may become risky depending on the circumstances, and calling emergency services should follow being visible to them, which is facilitated by the hazard lights.