Residents on the ground floor of a condo building at Yonge Street and York Mills Road had to wade through a small lake after a water main break on Friday.
As of 7:30 a.m. crews were still working to turn off the valve to stop the flood, which sent up to a foot of water through the building's entrance area and parking garage.
"Water is pouring down this street and into the condo building," CBC's Linda Ward reported. "The lobby and parking garage sit below grade level."
Ward spoke to Karen, a resident of the building, who described the damage inside.
"It looks like a dirty indoor pool. No elevators, no water and we waded through to get our car to come out here."
Karen said her car was submerged in about a foot of water.
Residents told CBC News that city crews had been looking into a water main problem on the street for the past several days.
"Those crews now have a much bigger job on their hands," Ward reported.
The southbound lanes of Yonge Street south of York Mills near Mill Street are completely underwater and traffic is being diverted into the northbound lanes.
The TTC's 97 Yonge bus is diverting around the area.