Which of the following situations would be included inside the hot zone?

The situation that involves entering a structure reported to be on fire would be included inside the hot zone because this term refers specifically to an area that poses significant risks and hazards, typically where active threats, hazardous materials, or dangerous conditions exist. In this case, entering a burning structure presents immediate dangers, such as smoke inhalation, potential explosions, or structural collapse, thereby classifying it as a hot zone.

Contrastingly, operating in a secure building, attending a safety briefing, and assessing equipment readiness all occur in environments that do not involve immediate physical threats. These activities can take place in safe areas and are typically associated with preparation or operational planning rather than direct response to an urgent hazard. Thus, they do not meet the criteria for being inside a hot zone.