A line of severe storms swept across southern and eastern Ontario Sunday night, bringing heavy rain and winds gusting to 90 km/h.

Hydro One says at the height of the storm the power was knocked out to well over 100,000 homes and businesses between Windsor and the Kingston area.

The power was back on for some by 6 a.m., but through the early morning some 86,000 Hydro One customers were still without power.

High winds responsible for outages across the province. Crews working to restore power to those affected.

— Hydro One (@HydroOne) November 18, 2013

In the Greater Toronto Area some 70,000 customers were left in the dark, and another 24,000 in London. Crews worked through the night to get the lights back on, though by early morning “small pockets” of Toronto were still without power according to Toronto Hydro.

We’re experiencing outages in a few small pockets as a result of winds. Approx. 150 customers affected. Hope to have all restored by 6 a.m.

— Toronto Hydro (@TorontoHydro) November 18, 2013

The weather system roared into Ontario after punishing the American Midwest with tornadoes and thunderstorms that left at least six dead in Illinois.

In the central Illinois town of Washington, a twister obliterated entire neighbourhoods, flipping vehicles, uprooting trees, and ripping down power lines.

The storms also caused damage in Kentucky, Wisconsin, Indiana, Ohio and Michigan.