If you accidentally left a gas stove on for a short period, like 30 seconds to 2 minutes, it's unlikely that a dangerous amount of gas would have accumulated in your home. However, even a small gas leak can produce a noticeable odor, which is added to natural gas to help detect leaks for safety reasons.
To dissipate the gas smell and ensure safety, you did the right thing by opening the windows to allow fresh air to circulate through your home. In most cases, the gas smell should fade relatively quickly after the gas supply is turned off and the area is properly ventilated.
However, if you are still noticing a strong gas smell even after three hours, it's essential to take some additional precautions:
Double-check the stove: Make sure the gas stove is completely turned off. Verify that all the knobs are in the "Off" position and no gas is flowing to the burners.
Check for gas leaks: If you suspect a gas leak, it's crucial to take it seriously. Avoid any open flames, smoking, or using electrical devices near the area where you smell the gas. Do not turn on or off any electrical switches, as a spark could ignite the gas. Leave the house immediately and call your local gas utility provider or emergency services to report the potential leak. They can send a professional to inspect and address the issue.
Use a gas detector: If you have a natural gas detector in your home, you can use it to help identify the source of the gas smell and determine if there is a significant gas leak.
Stay vigilant: If the gas smell persists or worsens, do not ignore it. Continue to keep windows and doors open for ventilation, and consider seeking professional help to investigate the source of the smell and address any potential gas leaks.
It's essential to prioritize safety when dealing with gas-related incidents. If you have any concerns or doubts about gas leaks or the smell of gas in your home, always err on the side of caution and seek assistance from professionals.