Los Angeles warehouse fire triggers shelter-in-place, ammonia leak concerns

Flames racing across rooftop solar panels turned a Boyle Heights warehouse fire into a hazmat response within minutes, forcing nearby residents to shelter in place and sending firefighters back from the building as ammonia gas escaped into the air. The blaze at Lineage’s cold-storage facility near 1400 South Los Palos Street spread over a dense industrial pocket of Los Angeles, where one structure can quickly disrupt air quality, traffic and emergency access.

The fire started around 2:30 p.m. on June 17 at the massive warehouse, described in reporting as about 500,000 square feet. Los Angeles Fire Department officials said the first crews to arrive saw fire showing from the roof of a single-story commercial building measuring roughly 1,000 feet by 500 feet, and commanders shifted the operation from offensive to defensive mode after a pressurized ammonia line was breached.

That detail made the incident more than a roof fire. Ammonia is a common industrial refrigerant, but when it leaks, it can irritate the eyes, nose and throat and make breathing harder, especially for people close to the release. In a neighborhood where a warehouse sits beside a major freeway and near residential streets, the chemical exposure widened the risk well beyond the building itself.

Los Angeles Fire Department Chief Jaime Moore said crews had trouble reaching the roof from the ground, and the response drew ground crews, hazmat teams and three water-dropping helicopters. Nearby buildings were evacuated, and the shelter-in-place zone covered streets south of the 101 Freeway in Boyle Heights. No injuries were reported.

The same site had burned before. On August 14, 2024, firefighters responded to the 1400 block of South Los Palos Street and found heavy smoke coming from the roof of a 479,152-square-foot structure built in 2018. More than 70 firefighters extinguished that fire in 48 minutes, with flames contained to part of the large solar panel array and no injuries reported.

That repeated pattern matters in a city filled with large logistics and cold-storage buildings tucked into older industrial districts. Rooftop solar, refrigeration systems and chemical lines can create a dangerous mix when fire breaks out, especially on sprawling roofs where access is limited and smoke can spread quickly over nearby homes and roadways.