Name a major priority during a primary search of a structure.

During a primary search of a structure, the foremost priority is to locate and rescue any occupants who may be trapped. This action is vital for saving lives, as people inside a burning or hazardous environment are often in extreme danger and may not be able to escape on their own. The primary search is conducted quickly and systematically, focusing on ensuring that all areas of the structure are checked for victims who are unaccounted for.

While gathering evidence, assessing structural stability, and extinguishing any fire presence are important aspects of fire response, they do not take precedence over the immediate need to locate and rescue individuals. Evidence gathering is typically conducted after the occupants have been secured, as it can interfere with rescue operations. Assessing stability and extinguishing fires, though critical for the safety of responders and further operations, are secondary to the life-saving efforts initiated during the primary search.