smoke pouring from chicago high-rise

from houston chronicle: Thick smoke poured from the roof of a 45-story office building Wednesday, forcing workers into the downtown streets as firefighters rushed inside. There was no immediate word on injuries.

At least one person taken away in an ambulance, but Kevin Smith of the city's Office of Emergency Management and Communications did not know whether there had been any injuries.

Smith said officials did not order an evacuation.

Rhonda Johnson said she was on the 44th floor when co-workers noticed smoke outside the building. She said she took an elevator to the ground floor, where she saw firefighters.

"We don't know what it is," she said. "There was no noise."

The building is located just west of the Chicago River.

uh oh, i hope it doesn't collapse from fire...