What is the first action to take if a leak occurs?

In the event of a leak, the most critical first action is to eliminate all possible sources of ignition. This is because natural gas or other gas leaks can create a highly flammable atmosphere, which can lead to explosions or fires if an ignition source is present. By removing potential ignition sources, such as flames, sparks, or electrical equipment, you are reducing the immediate risk of fire or explosion.

While notifying the gas supplier is important for addressing the leak itself, it is not the first action to take when safety is a primary concern. Turning off all heat sources and evacuating the immediate area are also essential actions that contribute to safety. However, without first ensuring that ignition sources are eliminated, these subsequent actions may not adequately prevent an explosive situation from occurring. Thus, prioritizing the elimination of ignition sources stands out as the essential first step in effectively managing a gas leak.