In a multi-alarm high-rise fire, what must happen if there is a working fire?

The correct approach in this scenario revolves around the necessity to order additional resources in response to an evolving situation like a multi-alarm high-rise fire. When a working fire is confirmed, it indicates that the fire is active and poses significant challenges that require an escalated response.

Ordering additional resources, such as a total of 4 alarms, ensures that sufficient personnel, equipment, and apparatus are available to effectively combat the fire, conduct search and rescue operations, and manage the incident safely. This preparedness is essential in high-rise situations where access, water supply, and the complexity of operations are critical factors.

While the other actions - such as conducting evacuations, deploying aerial units, or establishing a security perimeter - may also be important for overall incident management, the primary and immediate need in a working fire context is to guarantee that adequate resources are on hand to confront the emergency. This ensures a coordinated response capable of addressing the demands of such potentially hazardous situations.