What should be the first step taken after arriving at the scene of a structural fire?

Conducting a size-up of the situation should be the first step taken after arriving at the scene of a structural fire. This process involves assessing the scene for various critical factors, such as the location and extent of the fire, the structural integrity of the building, the presence of any hazardous materials, the accessibility for fire apparatus, and potential risks to firefighters and civilians.

Size-up allows firefighters to gather crucial information that informs their Incident Action Plan. It helps in determining the safest and most effective tactics to mitigate the incident. This initial assessment is essential for ensuring the safety of both responders and any potential victims, making it a fundamental aspect of fireground operations. By evaluating the situation before engaging in firefighting efforts or making other decisions, the incident commander can make informed choices about resource allocation, evacuation processes, and tactical approach.