It was initially categorized as a 4-alarm fire before being upgraded to a 7-alarm fire later in the evening, according to social media statements from BCFD.Start the day smarter. Get all the news you need in your inbox each morning.

A devastating seven-alarm fire tore through a vacant mattress warehouse in West Baltimore, Maryland Monday evening, sending plumes of smoke over the city, disrupting major rail lines and forcing the evacuation of dozens of residents.

Subsurface levels were stacked with mattresses, the city's fire chief said, and the blaze had grown to seven alarms by early Tuesday.