The alert will be in effect until further notice, de Villa said.
According to Environment Canada’s website, temperatures are forecasted to dip to -17 C in the evening on Friday with an overnight wind chill of -25.
Saturday is expected to have a high of -8 C with a morning wind chill of -25, becoming warmer in the afternoon with a wind chill of -11. Sunday will see a high of -1 C.
“Extreme cold weather alerts are issued when the temperature in the daily forecast suggests temperatures will reach approximately -15 C or colder, or when the wind chill is forecast to reach -20 or colder,” a statement from the City of Toronto reads.
City officials are warning residents to stay inside or, if they have to go outside, to dress in warm layers and wear a hat, warm gloves and boots.