Hit a gas line, and this could happen. Watch the fiery demo and the one step that can prevent it.

SAN DIEGO — Before you pick up a shovel for your next backyard project, there’s a crucial step that could save your life — calling 811.

In recognition of National 811 Day, San Diego Gas & Electric teamed up with San Diego Fire-Rescue to host a dramatic live demonstration of what can happen when someone accidentally strikes an underground gas line.

The event took place at SDG&E’s Skills Training Center, a realistic mock-up of a neighborhood where crews train to respond to gas emergencies. As part of the demo, a gas leak simulator was activated, releasing gas at 45 pounds of pressure per square inch, mimicking the force of a real rupture.

Within seconds, the gas was ignited, producing a powerful burst of flames.

“The idea was if somebody were to accidentally strike a gas line and it would find an ignition source, you get a sense of that energy, the awe of that event happening,” explained Kevin Geraghty, SDG&E’s Chief Operating Officer and Chief Safety Officer.

Geraghty painted a chilling scenario for the crowd: “Imagine this is right on the side of your house, next to your car or near a tree. Now you’re running inside to grab your kids, grab valuables. It becomes a chaotic event very quickly.”

According to San Diego Fire-Rescue, these kinds of incidents are more common than many realize, and they’re entirely preventable.

“All the utilities are buried underground, especially gas,” said Deputy Fire Chief Brent Brainard. “If you puncture it, those toxic gases start escaping. Once they find an ignition source, explosions can occur.”

Last year alone, the department responded to more than 250 natural gas-related calls, often referred to as “broken and blowing” gas lines.

Officials strongly urge anyone planning a project that involves digging, whether it’s a major construction job or simply installing a fence or mailbox, to call 811 at least 48 hours in advance. The free service sends trained professionals to mark the location of underground utilities, including gas lines, so you can dig safely.

“All of this can be avoided if you just simply call 8-1-1,” Geraghty reminded the crowd.

As flames shot into the sky during the simulation, the message was clear. Don’t risk it. Call before you dig.