What is a primary consideration before entering a hazardous area with an SCBA?

Ensuring a sufficient air supply is crucial before entering a hazardous area with an SCBA. This step guarantees that the individual has enough breathable air for the duration they plan to be in the hazardous environment. The air supply is the lifeline for the wearer, and inadequate air could lead to unconsciousness or worse if an emergency arises while inside, where access to fresh air is impossible.

Checking air quality parameters or environmental factors such as temperature and weight is important but secondary to ensuring you have an adequate amount of air to breathe. If a person has an insufficient air supply, no other considerations will matter if they cannot breathe adequately while performing their duties. This is why confirming the air supply is the first and foremost step in preparation for entering hazardous conditions.