What should be the first step in determining the origin of a fire?

The first step in determining the origin of a fire is carrying out a preliminary scene assessment. This initial assessment allows the investigator to gather crucial information about the fire scene, including the conditions present, visible fire patterns, and signs of any potential point of origin.

During this stage, the investigator will evaluate the scene for safety, identify potential evidence, and establish the layout of the area. This foundational understanding is vital as it informs subsequent steps, such as more detailed examinations and analyses of fire spread. Without a thorough preliminary assessment, any further investigation may lack context, leading to incomplete or incorrect conclusions about the fire's origin.

Prior to engaging in in-depth examinations or interviews, this initial assessment sets the framework for a systematic investigation, ensuring that all necessary factors are considered in determining how the fire began.