When arriving at the scene of a fire, personnel should be aware of all signs except?

When personnel arrive at the scene of a fire, it is crucial to assess various signs that indicate the intensity and spread of the fire. Black smoke billowing from the roof of a building is a significant indicator, as it implies that the fire is active and potentially growing. This type of smoke often suggests that fire has reached advanced stages, capable of causing rapid spread and increased danger.

In contrast, while visible flames, people evacuating the building, and signs of fire extension to neighboring structures are all critical signals to evaluate, black smoke specifically indicates a critical phase of the fire’s progression. It suggests an immediate threat to safety and requires firefighters to take heightened, strategic action. Recognizing and understanding the implications of these signs helps firefighters to make informed decisions about their approach, tactics, and potential risks associated in such situations.