Don’t Flip a Switch: 6 Licensed Plumber Steps After a Gas Leak in LA

If you smell a gas leak, get everyone out of the building immediately, moving at least 300 feet away, then call 911 and your gas utility’s emergency line from that safe distance. Do not flip a light switch, use your phone indoors, or try to find the source yourself. Let trained technicians handle everything from there.

TL;DR:

Move at least 300 feet away from the building before calling emergency services to avoid ignition sources and ensure safety.

Do not attempt to locate or repair the leak yourself, and avoid using any electrical switches or phones inside the building.

Signs of a gas leak include hissing sounds, dead vegetation, bubbling water, and physical symptoms like dizziness or nausea.

Only shut off the gas at the meter if a technician is not yet on scene and the leak is right at the meter, then leave the area immediately afterward.

A licensed inspection after the emergency is crucial to identify and repair the root cause, preventing future leaks and ensuring full safety.

Gas Leak: What to Do in the First Few Minutes
What Not to Do When You Smell Gas
What Are the Signs of a Gas Leak?
Should You Shut Off the Gas Yourself?
What Happens After You Report a Gas Leak?
Why a Professional Inspection Still Matters After the Emergency Ends
The Gap Between What People Assume and What Actually Keeps Them Safe
Get a Licensed Inspection After Your Gas Scare Is Over
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Gas Leak: What to Do in the First Few Minutes

The first minutes after you catch that rotten egg smell decide how the rest of the situation plays out. Move fast, but move calmly. Here’s the sequence to follow, in order:

Get everyone outside. Round up family members, roommates, and pets, and head for the door. Skip the urge to grab valuables or shut windows on your way out.
Keep going until you’re clear of the danger zone. Many utilities advise reaching 300 to 350 feet away from the structure, which is roughly the length of a football field, before you stop.
Call 911 first, then your gas utility’s emergency number, once you’re safely away from the building. If you’re in Southern California, SoCalGas staffs its emergency line around the clock specifically for this. Save that number in your phone now, before you ever need it.
Warn neighbors and stop anyone from going back inside, including delivery drivers, contractors, or family members who forgot something.
If the leak seems to be outdoors (near a meter, a construction site, or a street), still keep people back and still call it in. Utility crews handle outdoor line breaks the same way they handle indoor ones.
If anyone feels dizzy, nauseated, or short of breath, tell the 911 dispatcher immediately and describe the symptoms along with the suspected leak.

Pro Tip: Program your gas utility’s emergency number into your phone today, right next to 911. In an actual leak, you won’t want to be searching a website for it while standing on your neighbor’s lawn.

Reporting a suspected leak generally costs nothing. Utilities run this response as a public safety service, not a billable call, so there’s no financial reason to hesitate.

What Not to Do When You Smell Gas

Certain instincts that feel helpful are exactly what makes a gas leak dangerous. The New Hampshire Department of Energy is blunt about this, and for good reason: a spark, not the gas itself, is usually what turns a leak into an emergency.

Don’t light a match, a lighter, a candle, or a cigarette.
Don’t flip any light switch, use a garage door opener, or start your car in the garage.
Don’t use your phone, landline or cell, while you’re still inside the building.
Don’t try to sniff out or patch the leak yourself.
Don’t touch electrical outlets, appliances, or thermostats on your way out.

Natural gas ignites from surprisingly small triggers. Static electricity and minor sparks from routine electrical equipment can set off an accumulation of gas, which is exactly why utilities want you outside and hands off the switches before anyone investigates.

Pro Tip: Treat any electronic device, including your phone, as a potential spark source the moment you smell gas indoors. Walk out first, dial second.

What Are the Signs of a Gas Leak?

Natural gas is naturally odorless. Utilities add mercaptan, a chemical additive that produces that unmistakable rotten egg smell, specifically so leaks are noticeable. But smell alone isn’t a reliable test, since odor fade, a stuffy nose, or simple olfactory fatigue from prolonged exposure can mask it entirely.

Watch and listen for signs that don’t depend on your nose:

A hissing or whistling sound near a gas line, meter, or appliance.
Dead or discolored vegetation in an otherwise healthy patch of lawn.
Bubbling water in a puddle, pond, or wet soil with no obvious cause.
Blowing dirt, dust, or a visible flame near a pipeline or meter.

Physical symptoms matter just as much as environmental clues. Headache, nausea, dizziness, and shortness of breath are common signs of exposure, and if anyone shows them, call 911 right away and mention the suspected leak. Poison control at 1-800-222-1222 can also walk you through exposure guidance once everyone is safe. Skip the soapy water bubble test you might have seen online. It works fine for checking a fitting during routine maintenance, but during an active leak it means someone lingering near the source, which is the opposite of what you want.

Should You Shut Off the Gas Yourself?

In most cases, no. Utility technicians are trained to isolate and restore gas service correctly, and turning the shutoff valve yourself is generally something to leave to them once they arrive. Attempting it also means staying near the leak longer than necessary.

There are narrow situations where shutting off the meter valve yourself is the safer call, such as an active hissing leak right at the meter with no technician yet on scene. If that’s your situation:

Locate the shutoff valve on the pipe leading into the meter.
Use a wrench, not your hands, to turn the valve a quarter turn until it’s crosswise to the pipe.
Step away immediately afterward and continue waiting outside.

Never turn the gas back on yourself. Restoring service is a job for the utility or a licensed technician, who will check the entire system before flipping anything back on.

Pro Tip: If you must approach the meter, leave your phone in your pocket, powered off. Even checking a text near an active leak isn’t worth the risk.

What Happens After You Report a Gas Leak?

Once you call it in, two different teams typically show up, and they do different jobs. Firefighters or police arrive first in many cases and secure the area, manage traffic, and keep bystanders clear. Gas utility technicians handle the technical side: locating the leak, isolating the affected line, making the repair, and running safety checks before anyone goes back inside.

Expect to wait outside until a technician clears the property. That can take anywhere from a few minutes for a minor issue to longer for a more involved repair, and rushing back in before you get the all clear defeats the purpose of evacuating in the first place.

A few practical notes for afterward:

Reporting a suspected leak doesn’t cost you anything, even if it turns out to be a false alarm.
Ask for a report or reference number when you call, since you may need it for insurance or follow-up inspections.
For a larger incident involving a broken main or a fire, state pipeline safety regulators may get involved, which can extend the timeline before the area is fully cleared.

Why a Professional Inspection Still Matters After the Emergency Ends

Once the utility declares the immediate danger over, the leak itself often isn’t fully resolved. A dispatched technician typically stops the emergency, but the fix behind that valve, aging pipe, a corroded fitting, a damaged appliance connector, still needs a licensed plumber’s eyes on it.

Ez-plumbing holds a C-36 plumbing license (#583868) and handles gas leak detection and gas line repair work throughout the greater Los Angeles area. A proper follow-up visit includes a visual inspection of accessible lines and connections, pressure testing to confirm the system holds, precise leak location if any residual seepage remains, and a documented repair you can hand to your insurance company if needed.

Before the technician arrives, snap photos of the affected area, note the date and time you first noticed the smell, and keep the utility’s report number handy. That paper trail speeds up both the repair and any insurance claim that follows.

The Gap Between What People Assume and What Actually Keeps Them Safe

Most gas safety content treats “smell gas, get out” as the whole story, and stops there. The real gap is in the minutes right after: people go back for a phone charger, flip a switch out of habit, or start sniffing around the stove trying to be helpful. None of that is stupidity. It’s just human instinct running ahead of the danger.

The conventional advice also underplays odor fade. Plenty of homeowners assume that if they can’t smell gas anymore, the leak has stopped or moved. Often it hasn’t. Your nose adjusts faster than the leak resolves, which is exactly why hissing sounds, dead grass, and bubbling water deserve as much weight as your sense of smell.

If there’s one priority to take from all of this, it’s sequencing: evacuate completely before you do anything else, including calling. A phone call from inside a gas-filled room isn’t worth the risk it introduces. Get out first. Everything else, the call, the report number, the inspection, follows from that one decision.

— EZ

Get a Licensed Inspection After Your Gas Scare Is Over

A dispatched utility technician stops the immediate danger, but they aren’t in the business of diagnosing the aging fitting or corroded line that caused the leak in the first place. Ez-plumbing is that next step: a licensed residential and commercial plumbing team in the greater Los Angeles area that handles the follow-up work utilities don’t, from leak detection to full gas line repair, without the wait for a callback.

If your leak scare also has you wondering about the age of your water heater or other gas-fed appliances, it’s worth having them checked in the same visit. Ez-plumbing’s water heater installation team can inspect connections and recommend a replacement if your unit is contributing to the risk. If you smelled gas near an appliance rather than the main line, start with a professional leak detection visit to pinpoint the exact source before it happens again.