Crews were expected to be at the scene of a massive fire at a condominium in south Edmonton all night.
Firefighters were called to the four-storey Heatheridge apartment at 111A Street and 18th Avenue around 2:38 Thursday afternoon and a second alarm was called at 3:10 p.m.
The fire worsened over the course of the day.
Crews were pulled out of the structure after a mayday was called at 4:45 p.m., said Deputy Fire Chief John Lamb. There were no reports of injuries and everyone got out safely.
"We're fighting it from the exterior as it's extremely dangerous inside right now, the floors aren't stable and there's a lot of smoke inside," Lamb said.
As darkness set in, flames could be seen shooting out of the roof and the back of the building. More crews were called to the scene Thursday evening. Part of building collapsed and crews planned to pull down another section to stop the fire.
Fire investigators are still trying to determine a cause.
Work was underway on boilers in the building on Thursday which resident Eugene Martel thought was the cause of the irritated eyes he experienced when he woke up late in the morning.
Martel said maintanance staff came to the door and told him to "get the hell of here, there's a fire that's out of hand." A half hour later, he said there was smoke everywhere.
"You couldn't see anything," Martel said. "I didn't get on my hands and knees but you could just feel the walls and you knew where the entrances were and you just got out."
Disaster Social Services set up a centre for residents displaced by the fire in the Blue Quill Community Centre at 11304 25th Avenue. 92 people live in the building.