If you can smell gas, it’s crucial to act quickly and carefully to ensure your safety and those around you. Gas leaks can be extremely dangerous, potentially leading to explosions or fires. Here’s a step-by-step guide on what you should do immediately:
1. Turn Off the Gas
If it’s safe to do so, locate your gas supply valve and turn it off. The valve is usually near your gas meter, and you should turn the handle to a horizontal position to shut it off. This will help prevent any further gas from leaking.
2. Do Not Use Electrical Switches or Devices
Avoid turning on or off any lights, appliances, or electrical devices, including mobile phones. A small spark from a switch or plug could ignite the gas.
3. Open Doors and Windows
Immediately open all doors and windows to ventilate your home and allow the gas to disperse. This helps reduce the concentration of gas in the air.
4. Evacuate the Premises
Leave the building immediately. Ensure everyone inside leaves too, including pets. Do not stay inside to investigate or try to fix anything.
5. Do Not Use Naked Flames
Avoid lighting matches, candles, or smoking, as any naked flame could cause the gas to ignite.
6. Call the Gas Emergency Service
Once you are safely outside, call the National Gas Emergency Service on 0800 111 999 (if you’re in the UK). They operate 24/7 and will send someone to your property to assess the situation.
7. Do Not Return Until It’s Safe
Wait for professionals to check your property and give you the all-clear. Do not go back inside until you’re told it’s safe to do so.
8. Check for Pilot Lights
If your gas appliances, such as boilers or cookers, have a pilot light, make sure they’re turned off. A blown-out pilot light can sometimes be the cause of a gas smell.
Additional Tips:
- If the smell of gas is outside your home, report it immediately using the same emergency number.
- Consider installing a carbon monoxide detector and gas alarm in your home for added safety.
Acting quickly and cautiously is key when you detect a gas leak. Always prioritise safety and leave it to professionals to investigate and resolve the issue.



