When a North Texas summer sends temperatures past 100°F, the ground shifts. Clay soil contracts and expands with the heat, and gas lines buried in it – especially older ones in Mesquite’s 1970s-era neighborhoods – can shift, crack, and start leaking. That’s when the rotten-egg smell shows up, and that’s when a homeowner needs to know what to do when gas leaks.
This guide covers what we recommend before you call for help, what to do while you wait, and what a licensed gas line repair plumber actually does once they arrive.
We want to be upfront: this article is for general education. It is not a substitute for calling 911, your gas utility’s emergency line, or a licensed plumber. If you’re smelling gas right now, stop reading and get outside first.
Before You Call: Get Out, Don’t Investigate
Natural gas and propane are odorized with a chemical called mercaptan specifically so that a leak announces itself before it becomes dangerous – that sulfur or rotten-egg smell is a deliberate warning system, not a coincidence. When we get a call about a suspected leak, the single most important instruction we give is this: leave the house immediately. Don’t stop to find the source. Don’t go hunting for the gas shutoff valve unless it happens to be right there on your way out the door. Grab the people and pets closest to you and walk out. Every extra minute spent searching for the smell’s origin is a minute spent breathing an increasingly concentrated, flammable atmosphere.
A few reasons we’re firm about this:
- You can’t “find” a leak safely by smell alone. Gas disperses unevenly through a house, and what smells strongest in one room may not be where the leak actually is.
- Time matters more than thoroughness. Get everyone out first; the leak’s exact location is a job for a technician with a combustible gas detector, not a homeowner’s nose.
- Panic makes people forget things. Decide in advance, calmly, that your only job at this moment is exiting the structure.
Why You Shouldn’t Touch Anything Electrical
This is the instruction people most often get wrong, because it feels counterintuitive. Wouldn’t turning off a light help? It won’t – and it could make things far worse. Flipping a light switch, unplugging an appliance, or even pressing a garage door opener button can create a small spark. In a space with an accumulated concentration of natural gas, that spark is a potential ignition source. So as you leave, resist every instinct to turn off lights, silence a beeping appliance, or flip the switch on your way past the laundry room. Leave switches exactly as they are, whether on or off, and keep moving toward the exit.
Why You Shouldn’t Start Your Car
If your garage is attached to the house, or your vehicle is parked in a carport near a suspected leak, don’t start the engine to drive away. A car’s ignition system and starter motor can generate sparks, and the electrical systems in modern vehicles carry the same ignition risk as a light switch. If your car is in the garage, leave it there. Walk to a safe distance instead of driving. You can always come back for the car once your gas utility or fire department has confirmed the area is safe.
Why You Should Leave the Door Open on Your Way Out
If it doesn’t cost you extra time or require you to backtrack, leave the door open behind you as you exit. An open door allows some of the accumulated gas to begin venting to the outside air, which lowers the concentration inside and reduces risk for anyone who needs to enter later, including the technician. This isn’t a step worth stopping for – your exit always comes first – but if your path naturally takes you through a door that can be left ajar, don’t bother closing it.
After You Call: Stage Far Away and Stay Away
Once you’re safely outside, call your natural gas utility’s emergency line and a licensed plumber. From there, your job shifts from “get out” to “stay out and stay back.” We advise clients to move well beyond the immediate property line – across the street, or several houses down the block – rather than lingering in the driveway or front yard. Gas leaks, particularly ones involving an underground line or a meter, can affect a wider radius than most people assume, and North Texas’s flat terrain and prevailing winds mean gas doesn’t always disperse the way you’d expect.
Why Distance and Patience Matter
Standing at a distance isn’t about being overly cautious for its own sake; it’s about giving first responders and your gas utility room to work without a crowd nearby, and it’s about keeping you out of range if the situation is worse than a nose alone can judge. Once you’ve called, resist the urge to peek back at the house, check on pets you may have left behind, or wait by the front door for the crew to show up. Stay with your family at the staging distance, keep neighbors and bystanders back as well, and let the professionals confirm the property is safe before anyone approaches again.
Why You Should Never Re-enter Without a Professional
We understand the instinct to run back in – for a phone charger, a pet, an important document – but this is the one moment where we ask homeowners to override that instinct completely. Gas concentrations inside a closed structure can be far higher than what’s noticeable at the property line, and there’s no reliable way to judge from outside whether it’s safe to step back in. Wait for your gas utility or fire department to clear the property, and let your licensed plumber confirm the repair is complete and the line is holding pressure before resuming normal use of the home.
What a Licensed Gas Line Repair Plumber Actually Does
Once a technician arrives, the process will be methodical. Here’s what that typically looks like:
- Locate and measure the leak. Using a calibrated combustible gas detector, we pinpoint the exact source and measure its severity, rather than relying on smell.
- Shut down the meter and ventilate. We isolate the gas supply at the meter, then work to ventilate and stabilize the area before doing any repair work.
- Repair the line. Depending on what we find, this might mean replacing a corroded or damaged section of pipe, rethreading a loose fitting, or rewelding a joint – all performed to current code standards for North Texas homes, including considerations for our region’s shifting clay soils, which can stress underground lines over time.
- Test and restore. After the repair, we run a pressure drop test and a clock test on the meter to confirm the system holds pressure with no further loss. Once that’s confirmed, we relight pilot lights and appliances and walk you through restoring normal use of your gas system.
This layered process – locate, isolate, repair, verify – is exactly why gas line work isn’t a DIY project or a job for an unlicensed handyman. A repair that looks fine to the eye can still fail a pressure test, and it’s that final verification step that actually confirms your home is safe.
When You Smell Gas, Call a Licensed Professional
If you’ve smelled gas in your Mesquite or DFW-area home, or if it’s been a while since your gas lines and appliances were inspected, give us a call. Our licensed plumbing technicians are trained, insured, and experienced in exactly this kind of work across North Texas homes. We’d rather answer a call that turns out to be nothing than have a homeowner second-guess a real leak. Because when it comes to natural gas, there’s no such thing as “probably fine”.