Which of the following actions should firefighters take when air levels are low?

When air levels are low, the proper course of action for firefighters is to notify the incident commander and exit the area. This response is crucial for maintaining safety during operations. When air supplies dwindle, it poses a significant risk to firefighters' health and ability to perform their duties effectively. Alerting the incident commander ensures that appropriate measures can be taken, potentially including pump replacements or a strategic withdrawal from the hazardous environment.

It is vital to communicate immediately about low air levels because the incident commander can assess the situation and make decisions regarding resource allocation, safety protocols, and support for the team. Exiting the area helps to prevent any incidents of asphyxiation or reduced operational capacity due to inadequate air supply, thereby safeguarding the firefighters' welfare.