According to the FDNY F-89 study booklet, what defines the "affected area"?

The term "affected area" specifically refers to the regions that experience the immediate impact of a situation, such as a hazardous material spill or any other emergency incident. This definition highlights the places directly influenced by an emergency, where people may be in danger or require immediate assistance. Understanding this concept is crucial for emergency responders, as it informs where to focus their efforts and resources for evacuation, mitigation, or medical assistance.

In contrast, the entire building encompasses all spaces, not just those currently impacted. Designated evacuation areas are organized locations where people should move during an emergency, and secure areas refer to spots within a building that are not directly threatened and may provide shelter or safety. These concepts serve different functions and do not align with the idea of an "affected area" as it pertains to the direct consequences of an emergency.