PORTLAND, Ore. – About 45 people stayed at a Red Cross shelter in Portland after they were displaced due to a fire at Hotel Alder Wednesday afternoon.

Portland Fire and Rescue said just before 4 p.m. that the fire was under control. One person suffered an unknown medical condition.

The fire started at the Hotel Alder, located near Southwest 4th Avenue and Alder Street, just before 3 p.m. Wednesday, according to Portland Fire & Rescue. The fire was on multiple floors of the building.

Portland fire investigators said the fire started in the building's mechanical room and spread quickly because the building had an older heating system.

"I was blinded by the smoke," said one resident named Jesse. "I just knew the way because I live in the building, I knew the how the stairs went. There was some lights on the firemen and lights in the hallway but it was pretty much blacked out."

Firefighters called for additional crews and resources with second and third alarms.

Several people were initially unable to evacuate the building. Approximately 50 people made it out, some with the help of firefighters.

It’s unclear how the fire started.

Red Cross opens shelter

The local American Red Cross opened a shelter for those displaced by the apartment fire. Anyone affected by the fire who needs help can go to the First Christian Church, located at 1314 SW Park Ave.