Overview
- The rupture was reported around 4:20 p.m. near Ridge Route Road and Pine Crest Place, with residents describing loud booms and strong gas odors reaching parts of the San Fernando and Santa Clarita valleys.
- CHP issued a SigAlert and closed Interstate 5 in both directions, diverting northbound traffic to SR-126 and southbound to SR-138, before reopening the freeway a few hours later.
- A shelter-in-place order from the Santa Clarita Valley Sheriff’s Office covered roughly 14,000 to 14,900 residents with instructions to stay indoors and shut windows, vents, and HVAC systems.
- SoCalGas and fire crews isolated both ends of the broken transmission main by about 6 p.m., with hazmat teams monitoring residual seepage and officials reporting no injuries or immediate threat to Los Angeles.
- The cause remains under investigation, with deputies citing possible storm-related ground movement as a factor; arson and explosives detectives responded, Cal OES coordinated, and the governor was briefed.