MOUNT PROSPECT, Ill. (CBS) -- Firefighters braved dangerous heat Monday to battle an extra-alarm fire in an apartment building in northwest suburban Mount Prospect.

Smoke surrounded a building at 1852 W. Palm Dr., off Golf Road, within an apartment complex.

Flames were seen coming out of the building's roof. The building had a mansard roof, a style that originated in France in which the roof slopes down along every side.

The fire was reported under control at approximately 3:15 a.m. Tuesday.

Approximately 100 individuals were displaced from the apartment building. Still, with the assistance of the Red Cross and the Village of Mount Prospect Human Services Department, all have a place to stay.

"This was a perfect storm of operational challenges presented to responding firefighters," Village Manager Michael Cassady said in a statement. "The heat, mansard roof design, and excessive smoke made for very difficult conditions.'

Officials said the fire likely started in a small attic space, but the cause is still under investigation.

One firefighter suffered a minor injury and was treated at the scene.