Thousands of people were still left in the dark Monday morning after strong winds swept across Central and Southern Ontario – including Simcoe County, York Region and Muskoka.

The heavy rain and wind gusts rolled in late Sunday evening and continued overnight causing damage and power outages across the region.

Wind gust were measured up to 104 km/h along the Georgian Bay shoreline and up to 90 km/h inland.

In Tiny Township, large trees were uprooted and came crashing down on powerlines and roadways.

"I saw the hydro lines split in half and of course boom no power, it took only seconds," said Patricia Lefaive after she watched her neighbours tree come crashing down on power lines this morning.

At the height of the storm, Hydro One says more than 100, 000 customers were without power.

Hydro crews have been working around the clock assessing the damage and restoring power. Some service had been restored this morning but  by the noon hour more than 18 thousand customers were still without power across Central Ontario.

According to Hydro One, Hunstville is one of the hardest hit areas with nearly 4, 000 customers still in the dark.

Hyrdo crews were also busy today working to restore power in Aurora, Barrie, Bolton, Muskoka, Orangeville, Orillia, Parry Sound and communities in the Georgian Bay area.

At this point hydro officials don't know when power is expected to be fully restored.