At a working fire, what apparatus has the highest priority for position?

In the context of a working fire, the aerial apparatus holds the highest priority for positioning due to its critical role in both firefighting and rescue operations. Aerial apparatus, which typically includes ladder trucks, provide the ability to reach elevated areas of a structure, allowing firefighters to access upper floors and rooftops for firefighting, ventilation, and rescue tasks. The elevated platform can also be used to create a water supply from above, delivering fire suppression capabilities directly to the fire's location.

Furthermore, aerial devices can enable safe evacuation of civilians and firefighters by providing an exit route from high-risk areas. The multifunctional nature of aerial apparatus makes its positioning essential at fire scenes, particularly in scenarios where lives are at stake or when structural collapse is a concern.

While engine apparatus, tankers, and rescue apparatus serve important functions (such as providing water supply, transporting water, and conducting specialized rescue operations), none of these roles match the immediate and versatile benefits offered by aerial units at a working fire. Positioning an aerial apparatus effectively can significantly influence the outcome of the incident, making it a top priority for incident commanders on the scene.