When responding to a fire involving a flammable gas tank, what is the best action to take?

The best action to take when responding to a fire involving a flammable gas tank is to shut off the valve only if it will stop the leak. This approach addresses the source of the hazard by preventing additional fuel from entering the burning area. Ensuring that the valve is shut can help to mitigate the risk of further combustion and the potential for an explosive situation. However, it is important to note that this action should only be taken if it can be done safely without putting oneself or others in danger. Assessing the situation carefully before attempting to shut off the valve is crucial.

Evacuation of the area is also a critical safety measure but it does not actively address the source of the fire. Water should generally not be used on flammable gas fires as it can spread the fire or cause violent reactions, depending on the gas involved. Lastly, breaking the tank to release pressure is extremely dangerous and could lead to severe explosions, putting responders and bystanders at incredible risk.