What should be done immediately when the fire alarm system indicates an emergency?

In the event of a fire alarm system indicating an emergency, the most critical step is to call the fire department. This action ensures that professional firefighters are alerted and can respond quickly to the situation. Emergency services are trained to handle fire incidents effectively and will have the necessary equipment and personnel to manage the situation.

Timely notification allows for faster response, helping to minimize potential damage and increase the safety of all occupants. While evacuation is essential and should promptly follow the alarm, notifying the fire department is the first step to ensure that help is on the way, particularly in larger buildings where the alarm system may indicate more than just a localized fire.

Other options, such as activating the sprinkler system and conducting a headcount, are important, but they come after ensuring that professional help is on its way. Evacuation is a vital response to ensure the safety of all individuals present, but it can only occur effectively once the emergency services are alerted. Thus, calling the fire department is the first and most essential action to take when a fire alarm goes off.