2nd Alarm MCI (upgraded for more than 10 patients) which staffing combination is used?

• A. 5 Engines or Aerials, 5 Medics, 2 Battalions, 1 District Chief, 1 Safety
• B. 5 Engines or Aerials, 5 Medics, 1 Battalion, 1 District Chief, 2 Safety
• C. 5 Engines or Aerials, 4 Medics, 1 Battalion, 1 District Chief, 1 Safety
• D. 5 Engines or Aerials, 5 Medics, 1 Battalion, 1 District Chief, 1 Safety

Answer: (D)

This item tests the staffing pattern for a second-alarm mass casualty incident that’s upgraded for more than 10 patients. The recommended configuration at this level is five engines or aerials, five medics, one Battalion Chief, one District Chief, and one Safety Officer.

Five engines or aerials provide the platform to reach and support multiple patients and carry equipment for triage, treatment, and potential transport. Five medics give enough EMS personnel to perform triage and on-scene care across several patients, which is essential when the patient count exceeds a dozen or more. The Battalion Chief handles overall incident command, while the District Chief coordinates EMS operations, including casualty distribution and interagency coordination on scene. A single Safety Officer oversees scene safety to protect responders and patients; at this alarm level, one safety role is typically sufficient to maintain hazard awareness without overloading the command structure.

Options that reduce medics would strain triage and care capacity, while options that add extra safety officers or extra command roles go beyond what's required at this stage and can complicate the incident hierarchy.