In an IDLH atmosphere, when should firefighters wear SCBA?

Firefighters should wear self-contained breathing apparatus (SCBA) in an immediately dangerous to life or health (IDLH) atmosphere until they return to the cold zone. The cold zone is an area that is considered safe from hazardous conditions, where personnel can remove their SCBA without risking exposure to toxic gases or other harmful substances present in the IDLH environment.

Wearing SCBA is crucial in IDLH situations because these environments can contain harmful gases, smoke, or other contaminants that pose serious health risks. The cold zone, typically located away from the hazardous area, is designated as the transition space where firefighters can safely remove their protective equipment and breathe fresh air.

It is essential for firefighters to remain equipped with SCBA until they are secured in the cold zone, ensuring their safety and minimizing inhalation of hazardous materials during operation. The decision to remove SCBA should not be based solely on a feeling of safety or personal judgment, as the conditions could still be hazardous until a definitive and safe environment is reached. Therefore, maintaining SCBA use until safely in the cold zone aligns with established safety protocols and guidelines for handling IDLH situations.