People wearing face masks walk on a street in Toronto, Canada, Feb. 11, 2021. The City of Toronto issued an extreme cold weather alert on Thursday with the temperature expected to drop over the next 24 hours. (Photo by Zou Zheng/Xinhua)

The frozen Lake Ontario is pictured in Toronto, Canada, Feb. 11, 2021. The City of Toronto issued an extreme cold weather alert on Thursday with the temperature expected to drop over the next 24 hours. (Photo by Zou Zheng/Xinhua)

People play hockey on frozen Lake Ontario in Toronto, Canada, Feb. 11, 2021. The City of Toronto issued an extreme cold weather alert on Thursday with the temperature expected to drop over the next 24 hours. (Photo by Zou Zheng/Xinhua)

Toronto skyline is seen through ice near Lake Ontario in Toronto, Canada, Feb. 11, 2021. The City of Toronto issued an extreme cold weather alert on Thursday with the temperature expected to drop over the next 24 hours. (Photo by Zou Zheng/Xinhua)