How many personnel respond to an active shooter scenario as per the MCI 1st alarm?

The correct response indicates that the standard deployment for an active shooter scenario, referred to as MCI (Mass Casualty Incident) 1st alarm, includes 3 engines, 2 trucks, and 2 battalions. This composition is specifically structured to address the unique challenges presented by an active shooter situation, where both efficient rescue operation and tactical support are crucial.

The three engines provide essential firefighting and emergency medical support, as they are equipped to deliver water for fire suppression and, importantly, carry medical supplies and personnel capable of triaging victims. The inclusion of two trucks allows for additional rescue capabilities, as truck companies usually bring specialized equipment for access and support operations in complex environments.

Meanwhile, the presence of two battalions enhances command and control, ensuring that operations are coordinated effectively given the unpredictable nature of active shooter scenarios. This allows for a unified incident command structure, which is vital in managing both the tactical response to the shooter and the medical treatment of victims.

In summary, this option reflects a well-planned response system that integrates firefighting, medical, and incident management resources, tailored specifically for the demands of an active shooter event.