What key factor should be assessed before entering a structure on fire?

Before entering a structure that is on fire, assessing building stability is crucial for the safety of firefighters. This assessment helps determine whether the structural integrity of the building has been compromised by the fire. Factors such as heat exposure, damage from the fire, or potential collapse due to weakened structural elements must be considered. This evaluation can significantly reduce the risk of injury or death for firefighters and ensure that they can execute their duties without unnecessary danger.

By understanding the condition of the building, firefighters can make informed decisions about tactics, entry points, and evacuation plans if necessary. This emphasis on assessing building stability is a foundational principle in firefighting, as collapsing structures pose one of the most significant threats during fire response operations.