Neighbourhoods closer to Bloor Street and further south are also said to be affected, including High Park, Bloor West Village, Liberty Village and the University of Toronto. An outage map on the Toronto Hydro website indicated the outage reaches as far south as the lake.
Train service on the Bloor-Danforth line has been shut down between Jane and St. George Stations, due to signal problems associated with the power loss, according to the TTC. Shuttle buses are running.
By shortly after 10 p.m. there were reports that power was back on in some of the affected areas, though much of the west end remained dark.
Hydro One said the blackout was due to a problem in its transmission system. Crews are investigating but there was no further word from Hydro One about the cause.