"Over 200,000 customers are without power as the #ONstorm continues. We expect customers in the hardest hit areas of south, central & eastern ON to be without power overnight. As soon as it's safe, more crews will be on their way to help. We appreciate everyone's patience", Hydro One tweeted.
The Canadian government has issued weather warnings for the province's southern areas over strong winds gusting up to 90 or 100 kilometres per hour (55 to 62 miles per hour).