What action is recommended during a fire emergency in relation to oxygen sources?

During a fire emergency, shutting off the oxygen at the source, if possible, is a crucial action. Oxygen supports combustion; therefore, removing or limiting the oxygen supply can significantly hinder the fire's ability to spread and grow. This action helps protect both the environment and the individuals present, especially those who might be using supplemental oxygen for medical reasons. Without the availability of oxygen, flames cannot sustain themselves, reducing the risk of the fire escalating further.

Evacuating with oxygen could pose risks, especially if the oxygen source itself is flammable or if carrying it creates obstacles in escape. Leaving the oxygen running could exacerbate the situation by providing additional fuel to the fire, increasing the severity of the incident. Igniting the oxygen source is unsafe and would contribute to a more dangerous environment. Hence, turning off the oxygen supply is the safest and most responsible course of action during a fire emergency.