What initial step should be taken in response to a mass casualty incident involving hazardous exposure?

In a mass casualty incident involving hazardous exposure, the initial step of quickly triaging patients for exposure severity is essential because it allows healthcare providers to assess which individuals are most critically affected and in need of immediate assistance. Triage is a systematic approach that ensures resources are allocated effectively based on the severity of injuries and the nature of the exposure.

By prioritizing patients according to the severity of their condition, emergency responders can focus on those who require urgent care. This is particularly important in hazardous exposure situations, where some individuals may show signs of severe contamination or life-threatening reactions while others may be asymptomatic or have minor injuries. Quick and efficient triage helps to maximize outcomes and ensures that those who are most in need receive care first.

Other approaches, such as treating all patients at once, may dilute the attention and resources allocated to the critically ill, and quickly allocating resources to the worst affected without proper triage can lead to inefficient use of limited medical supplies and personnel. Immediate evacuation of the area, while potentially necessary in some cases, is not the first step when dealing with casualties already present; it can further complicate the situation if not managed alongside a triage process. Hence, effective triage serves as the foundation for a coordinated response in the chaotic and