Power has been restored to most homes in southern Ontario just in time for temperatures to drop, but some residents in Atlantic Canada are facing the cold in the dark.
Temperatures are expected to hit -13 C in parts of Ontario Wednesday, and -19 C in Ottawa.
As of late Monday night, 290 customers were without power in Toronto, while Hydro One said 466 customers in Kingston and 96 in the Mississauga area were without power Tuesday morning.
In New Brunswick, about 2,200 customers were still in the dark Tuesday as the temperature hit a high of -15 C. Environment Canada expects temperatures will dip further to -19 C on Thursday, before warming to -2 C on Sunday.
"No system is designed...for this size of catastrophic series of storms — the largest challenge our utility likely has ever faced," NB Power said on Twitter Tuesday.
Quebec Hydro reported 2,000 customers were without power Tuesday after strong winds brought down more power lines and branches on Sunday. Crews planned rolling blackouts during repairs.
Montreal residents had toques, scarves and mittens firmly in place where the temperature was -18 C but felt more like -25 C with wind chill.
Other parts of the country also experienced a deep freeze Tuesday. In Saskatoon it was -32 C and the mercury dropped to -37 C in Winnipeg.
Vancouverites were likely the envy of most Canadians. Temperatures in the B.C. city sat at 6 C Tuesday, but there was a light drizzle.