The affected intersections include Bathurst St. and Wilson Ave., Palmerston Ave. and Queen St. W., Brookwell Drive and Streamdale Court, and Newbold Ave. and Gainsborough Rd.
At one point in the morning, there were reports of at least a dozen transformer fires. A Toronto Hydro spokesperson was unavailable for comment.
Meanwhile, the snowy conditions have created a logjam on the highways and city streets, with many collisions reported.
The heavy snow is expected to end by this afternoon, leaving up to four centimetres in its wake.