Hundreds of flights were cancelled or delayed Sunday as Toronto was hit with a blizzard and temperatures so bone-chilling that the city urged residents to stay home and avoid unnecessary travel.聽

"We are a caring city, a city that supports each other and cares for each other. So if you see someone being stuck ... if you notice that people are having difficulty, give them a hand," Mayor Olivia Chow told a news conference Sunday afternoon.

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