What should be the first step when removing passengers from a derailed train?

The first step in an emergency situation involving a derailed train is to ensure the safety of both the passengers and the rescue operations. Placing the brakes of following trains in emergency is crucial because it helps to prevent any further accidents, such as additional collisions or exacerbating the situation on the tracks. This action creates a secure environment for both emergency responders and the passengers remaining on the train.

Addressing the condition of following trains is paramount to avoid potential chaos and ensure those on the scene can focus on the immediate needs of the passengers. Once the situation is stabilized in terms of preventing additional risks, it becomes appropriate to notify authorities, assess passenger injuries, and signal for a rescue team. Each of those subsequent steps is essential, but the immediate priority is to control the area around the incident and halt any further train movement.