Clouds of dark smoke and ammonia rose from cold storage and freezing facility in Boyle Heights near downtown The solar panel-covered roof of a 500,000 sq-ft cold storage facility in Los Angeles caught fire Wednesday, sending up thick clouds of dark smoke and ammonia, leading city officials to order nearby residents to shelter in place. About 110 firefighters responded in the afternoon to a blaze at the cold storage and freezing warehouse owned by Lineage in the Boyle Heights neighborhood near downtown, according to spokesperson Jennifer Middleton of the Los Angeles fire department. Both the city and Los Angeles county deployed firefighters and hazmat teams to contain the fire.