UPDATE:
The Baltimore City Fire Department (BCFD) says the fire is officially under control. The units still at the scene will be putting out hotspots throughout the night.
BCFD has confirmed with Amtrak the process of restoring rail service is in motion.
The Baltimore City Office of Emergency Management is working with the Department of Housing and Community Development and BCFD to help evacuated residents to return safely.
The cause of the fire is still under investigation.
Original Article:
A massive 7-alarm fire ripped through a mattress warehouse in West Baltimore Monday night.
The fire has since been contained to the building. Amtrak service has been restored, but restricted to one track officials say.
Some firefighters are still on the scene addressing hot spots and it has been downgraded to a 3-alarm fire.
According to Fire Chief James Wallace, they're unsure if the building was completely vacant.
Hear Chief James Wallace discuss how Baltimore Fire crews planned their attack on the fire
The call came in just before 7:00 p.m., in the area of Edmondson Avenue and Bentalou Street.
What started as a 4-alarm quickly rose to a 7-alarm as crews tried to get it under control.

RELATED: Baltimore City Fire on the scene of major multi-story warehouse fire in West Baltimore
Due to the fire, MARC train service on the Penn line is cancelled for Tuesday morning. Passengers can use the Camden Line or other alternatives.
Travelers can expect delays of about 30-60 minutes between Baltimore and Washington on the Amtrak. They're expected to continue throughout the day.
Over 200 firefighters were on scene fighting the blaze.
The Red Cross of the National Capital & Greater Chesapeake Region is working with Baltimore City partners to help people who have been displaced by the fire.
The residents from 15 households evacuated from the 600 block of North Bentalou Street will be temporarily housed by Baltimore in a hotel.
No injuries have been reported and the cause of this fire remains under investigation.