According to Hydro One, 6,365 customers were without electricity as of 12:50 p.m.
More than 180 outages are currently active, according to the utility, and employees are trying to bring power back to consumers.
The outages are dispersed throughout the Greater Toronto and Hamilton Region, sections of Niagara, Pembroke, Parry Sound, Kingston, and westward to just beyond Windsor. They also extend from just outside Ottawa to Pembroke, Parry Sound, and Ottawa.
On Saturday, Environment Canada issued wind advisories for a number of locations, including Kingston, Chatham-Kent, Windsor, Niagara Region, London, Middlesex, and Prince Edward County.
According to the service, starting on Saturday evening, the affected areas would suffer severe southwesterly winds with gusts of up to 90 or 100 km/h.