Which statement best describes a Mass Casualty Incident?

• A. It overwhelms local resources and may require federal and state assistance
• B. It is a small event manageable by a clinic
• C. It only occurs in natural disasters
• D. It always remains within local resources

Answer: (A)

Mass casualty incidents occur when the number of injured people overwhelms the local medical resources, triggering the need for external support. The statement that best describes this is that it overwhelms local resources and may require state and federal assistance because it captures the central challenge of an MCI: normal protocols and capacity aren’t enough to care for all victims, so agencies bring in additional help through mutual aid, state resources, and sometimes federal support. This situation also requires organized command and surge planning, with triage and patient distribution coordinated under a unified incident command system. It’s not restricted to a single type of event, and it isn’t limited to what the local system can handle on its own, which is why the other options don’t fit as well.