Los Angeles, United States - December 28, 2025 12/27/2025 07:15 pm GMT-0800 CASTAIC, Calif. – A massive 36-inch underground natural gas pipeline rupture sent high-pressure gas spewing into the air across the Santa Clarita Valley moments ago, prompting emergency evacuations and shelter-in-place orders in the Castaic area. The leak has since been mitigated, according to Los Angeles Fire Department Capt. Brian Kight. The rupture was reported shortly before 4:15 p.m. near Ridge Route Road and Pine Crest Drive in Castaic, adjacent to a hillside near a water storage tank. Authorities say a large landslide either caused the pipeline to fail — or was triggered by the rupture itself — as soil shifted beneath the infrastructure. Witnesses described off-camera a deafening roar coming from the hillside as natural gas escaped under extreme pressure, creating a scene that could be heard from miles away. Firefighters with the Los Angeles County Fire Department immediately established a safety perimeter and ordered a shelter-in-place for nearby residents, including homes surrounding Northlake Hills Elementary, due to the risk of ignition and hazardous air conditions. As of 6 p.m., crews were working to secure the area while utility officials were attempting to isolate and shut down the damaged gas line. No injuries were reported as of early evening, but officials warned at that time that the situation remains active and dangerous, urging residents to avoid the area and follow all emergency instructions. The cause of the rupture and the extent of infrastructure damage remain under investigation as crews assess the stability of the hillside.