What Not to Do If You Smell Gas After an Earthquake

If you smell gas after an earthquake, small everyday actions can become risky. Learn what not to do, what warning signs to notice, and how to respond calmly and safely.

Why Gas Smell After an Earthquake Deserves Your Attention

After an earthquake, most people immediately check the obvious things. Is everyone okay? Did anything fall? Are the windows cracked? Is the power still on? Is the house still standing?

But one of the most important warning signs after shaking stops can be something you smell, not something you see.

Natural gas is commonly given a strong “rotten egg” odor so people can notice a possible leak. After an earthquake, gas lines, appliance connections, meters, and valves may be damaged or loosened. Even a small leak deserves attention because gas can build up in enclosed spaces, and certain everyday actions may create a spark or flame.

That does not mean every strange smell is automatically a disaster. It does mean you should treat a possible gas leak with respect and avoid the common mistakes people make when they are nervous, curious, or trying to “check things quickly.”

Public safety agencies commonly advise avoiding flames, light switches, appliances, and other spark-producing actions if a gas leak is suspected after an earthquake. The CDC also notes that if you smell gas or see a broken line after an earthquake, the main gas valve should be shut off from outside, and service should be restored by a professional.

The safest habit is simple: if you smell gas after an earthquake, do less, not more. Do not test things. Do not troubleshoot indoors. Do not try to prove whether the leak is “serious.” Get away from the smell and call for help from a safe location.

Why Earthquakes Can Lead to Gas Leaks

Shaking Can Loosen Connections

Gas systems are built to be sturdy, but earthquakes put unusual stress on a home. Appliances can shift. Water heaters can move. Rigid pipes may crack. Flexible connectors may stretch or loosen. Older homes may have connections that are more vulnerable than newer ones.

Sometimes the damage is obvious, like a fallen water heater or a visibly broken pipe. Other times, the only clue is a faint odor.

That is why the smell matters. You may not be able to see the leak, especially if it is behind a stove, near a furnace, in a crawl space, or outside by the meter.

Aftershocks Can Make Damage Worse

Another reason to be cautious is that earthquakes often come with aftershocks. A connection that was weakened during the first quake may shift again. A small leak may become more noticeable later.

This is one reason it is not a good idea to rush around turning things on and off right after shaking stops. Take a breath, check your surroundings, and pay attention to what you smell and hear.

Gas May Travel Through Hidden Spaces

Gas does not always stay exactly where the leak begins. It can move through wall cavities, under floors, around utility openings, or into low-ventilation spaces. You might smell it in one room even if the source is somewhere else.

Because of that, it is not worth trying to “follow your nose” around the house. Searching room by room can keep you in a place you should be leaving.

Never Light a Match, Candle, or Lighter

Flames Are an Obvious Risk

If the power goes out after an earthquake, many people instinctively reach for candles or matches. That might seem practical during an ordinary blackout, but it is not a safe first move if there is any chance of a gas leak.

A flame can ignite gas. This includes matches, candles, lighters, gas lanterns, pilot lights, fireplaces, and grills.

The Red Cross advises not lighting matches or turning on lights or appliances until you are sure there are no gas leaks or flammable liquids spilled.

Use Battery Light Instead

A flashlight or battery-powered lantern is a better option for checking your path as you leave. If you live in an earthquake-prone area, keep flashlights in easy-to-reach places, not buried in a closet behind heavy items.

It also helps to keep extra batteries nearby. After a quake, you may be dealing with broken glass, fallen furniture, and dark hallways. Having a safe light source ready makes it easier to move without using candles.

Do Not Flip Light Switches On or Off

Even a Small Spark Can Matter

One of the most common mistakes people make is flipping a light switch to “see what happened.” It feels harmless because it is such a normal action.

But electrical switches can create tiny sparks. In normal life, you never notice them. Around a possible gas leak, that small spark is exactly what you want to avoid.

This includes turning lights on and turning lights off. If a light is already on, do not walk around switching it off while you smell gas. Just leave.

Avoid Other Wall Switches Too

The same idea applies to garbage disposals, bathroom fans, ceiling fans, range hoods, garage lights, and any other wall switch. Do not test whether power is working. Do not reset breakers. Do not unplug appliances.

If gas is suspected, the goal is not to make the house neat or electrically “safe” before leaving. The goal is to avoid creating ignition sources.

Do Not Use Appliances or Electronics

Appliances Can Create Sparks or Heat

After an earthquake, you may want to check whether the stove works, whether the furnace is running, or whether the refrigerator still has power. If you smell gas, avoid using appliances.

Do not turn on the stove. Do not start the dryer. Do not use the oven. Do not run the furnace. Do not operate a dishwasher, washing machine, microwave, space heater, or garage door opener.

Earthquake Country Alliance warns that until you are sure there are no gas leaks, you should avoid open flames and electrical or mechanical devices that could create sparks, including light switches, generators, and motor vehicles.

Do Not Try to “Air Things Out” With Fans

Opening a window gently on your way out may be reasonable if it is safe and does not delay your exit, but do not turn on fans to clear the smell. A fan is an electrical device. It may also move gas through the home in unpredictable ways.

If the odor is noticeable, leave the building and make the call from outside and away from the smell.

Do Not Use Your Phone Right Next to the Smell

Step Away First, Then Call

Many people know to call for help, but they may do it while standing in the kitchen, garage, or utility room where the smell is strongest. It is better to leave first.

Some utility companies advise leaving immediately and not using phones, electrical switches, cars, or anything that could create a spark until you are at a safe distance. CenterPoint Energy, for example, tells customers who smell gas to leave on foot and call from a safe location.

The practical takeaway is simple: do not stand inside the suspected leak area making calls, taking videos, or texting updates. Get outside first.

Avoid Taking “Proof” Videos Indoors

It is understandable to want documentation, especially after an earthquake. But if you smell gas, this is not the moment to film a house tour.

You can document damage later, once the area has been cleared as safe. For now, your phone is for calling from a safer place, not investigating indoors.

Do Not Start a Car in an Attached Garage

Cars Can Create Ignition Sources

If your car is parked in an attached garage and you smell gas after an earthquake, do not start it to move it out. Starting a vehicle involves electrical and mechanical systems that can create sparks.

This is especially important if the gas smell is in or near the garage. Leave on foot instead.

Garage Door Openers Are Also Electrical

Do not use the automatic garage door opener if you suspect gas nearby. If you can safely leave through a regular door, do that. Do not spend time trying to open every door or move vehicles.

A car can stay where it is. Your priority is to get yourself and others away from the possible leak.

Do Not Search for the Leak With a Flame

This Old Habit Is Extremely Dangerous

Some older advice or bad habits still float around, such as checking for a gas leak with a match. Never do this.

Do not use a lighter, candle, match, or any flame to look near a pipe, stove, furnace, water heater, or meter. A gas leak should never be “tested” this way.

If you smell gas, hear hissing, or see a broken gas line, treat it as a warning sign and leave the area.

Do Not Put Your Face Near Pipes or Appliances

You also do not need to lean close to appliances to confirm the smell. Getting closer does not make the situation safer or more useful.

A quick awareness check is enough: rotten egg odor, hissing sound, damaged gas appliance, fallen water heater, broken pipe, or symptoms that something is wrong. After that, stop investigating.

Do Not Turn Gas Back On Yourself

Turning It Off Is Different From Restoring Service

In some earthquake situations, official guidance says the gas should be shut off if you smell gas or see a broken gas line. But once the gas is off, turning it back on is not a do-it-yourself task.

California’s Office of Emergency Services notes that if you suspect a leak or smell natural gas, you should shut off the main gas valve, and once gas is turned off, you should not turn it back on yourself; the utility company should check for leaks and restore service.

This can be inconvenient. You may lose hot water, heat, or cooking ability for a while. But restoring gas without checking the system can create a new hazard.

Know Where the Shutoff Is Before an Earthquake

The best time to learn where your gas shutoff valve is located is not during a stressful emergency. If you have natural gas service, learn where the meter is and what tool may be needed.

Many local utilities provide guidance on this, and some recommend not shutting off gas unless you smell gas, hear gas escaping, or see damage. Follow your local utility’s instructions.

Common Mistakes People Make After Smelling Gas

Mistake 1: “I’ll Just Check the Stove”

After a quake, someone may smell gas and immediately walk to the stove to check the knobs. If the stove is right by the smell, this keeps you in the area longer.

If a knob is obviously on and you can turn it off without using switches or delaying your exit, that may be different from searching. But if you are unsure, do not investigate. Leave and call from outside.

Mistake 2: “Let Me Open Every Window”

Fresh air sounds helpful, but walking through the house opening every window can waste time. It may also bring you closer to the leak source.

If a window or door is right along your exit path and can be opened easily, fine. But do not make ventilation your main mission. Getting people out comes first.

Mistake 3: “It’s Probably Nothing”

Gas odor after an earthquake is not something to dismiss. Even if the smell is faint, take it seriously. You do not need to panic, but you should act.

A calm response might be: stop using anything electrical, avoid flames, leave the building, move away from the smell, and call the gas company or emergency services from a safe location.

Mistake 4: “I’ll Wait and See If It Goes Away”

A smell that fades does not always mean the problem is solved. Air movement can change. Your nose can adjust. The leak may be intermittent.

If the smell was strong enough for you to notice after an earthquake, it is worth reporting and checking.

Simple Preparedness Tips Before the Next Earthquake

Keep Flashlights Easy to Reach

Place flashlights near beds, in the kitchen, by exits, and in your emergency kit. Choose battery-powered lights instead of relying on candles.

Check the batteries occasionally. A flashlight with dead batteries is not much help when the power goes out.

Secure Gas Appliances

Water heaters and other gas appliances should be properly secured, especially in earthquake-prone regions. A shifted appliance can strain gas connections.

If you are unsure about your setup, ask a qualified professional or your local utility what is recommended for your area.

Learn Your Utility’s Guidance

Gas shutoff advice can vary by utility and region. Some areas encourage residents to know how to shut off gas when a leak is suspected. Others emphasize calling the utility and avoiding unnecessary shutoffs.

The important part is knowing the guidance before you need it.

Talk Through the Plan With Your Household

A simple family plan helps prevent confusion. Make sure everyone knows not to use matches, candles, switches, appliances, or phones indoors if gas is smelled after an earthquake.

Choose a meeting spot outside. Decide who helps children, older adults, or pets. Keep the plan short enough that people can remember it under stress.

A Practical Example: The Kitchen After a Quake

Imagine a moderate earthquake shakes your home in the evening. A few dishes break. The power flickers. You walk into the kitchen and notice a rotten egg smell.

The wrong move would be to turn on the light, check the stove, call someone from the kitchen, open every window, and then look behind the appliances with a flashlight app.

A better response is calmer and simpler. Do not touch switches. Do not light anything. Do not use appliances. Gather the people nearby, leave the house, move away from the smell, and call the gas utility or 911 from outside.

It may feel like you are “doing less,” but that is exactly the point. Around a possible gas leak, unnecessary actions create unnecessary risk.

Conclusion: When You Smell Gas, Keep It Simple

After an earthquake, a gas smell is one of those signs you should not ignore. You do not need to panic, and you do not need to become an expert on gas systems. You just need to avoid the actions that can make the situation more dangerous.

Do not light matches or candles. Do not flip switches. Do not use appliances, fans, garage door openers, or vehicles near the smell. Do not stand inside making phone calls or taking videos. Do not search for the leak with a flame. And if the gas is turned off, do not turn it back on yourself.

The safest response is usually the simplest one: leave the area, call from a safe place, and let trained professionals check the system. A calm pause and a few careful choices can protect your home, your family, and everyone nearby.