LOS ANGELES — A fire at a massive warehouse blackened the skies near downtown Los Angeles on Wednesday afternoon, prompting shelter-in-place orders in the area due to the risk of hazardous air.

Los Angeles firefighters responded around 2:30 p.m. to the blaze, which was sending large plumes of dark smoke into the air in the Boyle Heights neighborhood. Local news stations showed smoke billowing from the burning roof of the warehouse, which was covered in solar panels.

Officials issued an alert to the area shortly after, warning of “hazardous materials nearby.” Residents were told to close all windows, doors and vents, turn off air conditioning and bring people and pets to an inside room.

Los Angeles Fire Department spokesperson Jennifer Middleton said there was previous concern over the fire burning an ammonia line, but that danger had “dissipated.” The roof blaze had been extinguished by late afternoon and firefighters were entering the building to assess the interior, Middleton said.

The building at the address is listed online as a cold storage warehouse owned by Lineage Logistics for the transport of frozen or other temperature-controlled goods. It contains 491,000 square feet (45,600 square meters) of warehouse space, according to its website. The company did not immediately respond to an emailed request for comment.