When should defensive action be taken regarding gas utilities?

Defensive action regarding gas utilities is critical when the gas utility cannot be controlled. This situation often arises during emergencies where the risk of explosion or fire is significantly heightened due to the presence of gas leaks or the inability to shut off gas services safely. Taking defensive measures in this context is crucial because it helps protect both the firefighters and the public from potential hazards while awaiting assistance or additional resources to manage the situation safely.

Waiting until the fire is extinguished, as implied in one option, would not be prudent since the risk may still exist during the firefighting process. Similarly, preparing for inspections or only acting during training exercises does not pertain to immediate safety risks presented by uncontrolled gas utilities in emergency situations. Thus, proactive defensive action is necessary at the point of recognizing the limitations in controlling the gas utility during an incident.