What action is recommended if a gas leak is suspected?

If a gas leak is suspected, evacuating the area and contacting emergency services is the recommended action because safety is the top priority. Natural gas is highly flammable and can lead to dangerous situations, including explosions. By leaving the area, individuals remove themselves from potential harm while allowing emergency responders to assess and manage the situation safely.

In this context, checking appliances immediately could create a spark that exacerbates the situation, and lighting a match poses a significant fire risk. Turning off the thermostat, while it may seem like a precaution, does not address the immediate danger of the gas leak and could also lead to unsafe conditions if there are any ignition sources present nearby. Thus, prioritizing personal safety by evacuating and seeking professional help is the most responsible and effective course of action.