Sunday's storm came in two waves: the first at supper hour, the second before midnight.
The storm brought heavy rain, hail and in some areas, brought down trees and flooded streets. At the height of the storm, about 50,000 people were without electricity. As of 8 a.m. Monday, about 25,000 Hydro One customers remained without power while Toronto Hydro's online outage map showed only a handful of outages.
The outages are spread over a vast area of Ontario, from Muskoka to outside Windsor.
Hydro One said Monday it hopes to have power restored to all customers today.
Veld Music Festival cancelled
The storm forced the sudden cancellation of the Veld Music Festival in Toronto. Just before 6 p.m. Sunday — the second day of the two-day festival — concert goers were told to vacate the concert site at Downsview Park as lightning filled the skies.
Ticket holders asked about refunds on Twitter Monday, but so far there's no word on whether any money will be returned as compensation for shutting the show down early.
There were four reports of possible tornado sightings during the storm, but those have yet to be confirmed by Environment Canada.
Today, most of southern Ontario will see calmer weather, though there's a chance of afternoon thunderstorms in some areas.