The construction crew wasn't hired to blast away in a tinder-dry zone to deliberately set of the blaze, were they? No, only conspiracy theorists would believe such an absurdity.

5,600 hectares burned = 13,838 acres or 21.6 square miles.

Massive Ontario forest fire sparked by wind farm construction during extreme fire ban, workers allege
Dave Seglins | CBC News
July 24, 2018
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CBC News obtained this photo taken Wednesday of the Henvey Inlet construction site where workers say the fire began after a machine got stuck in bone-dry bush. (Name withheld by request)

Ontario's Ministry of Natural Resources and Forestry is investigating whether construction crews building a major wind-turbine project on the eastern shores of Georgian Bay amidst tinder-dry conditions caused a forest fire that is now devouring more than 5,600 hectares of land.

The fire started last Wednesday on Henvey Inlet First Nation at the site of the province's largest wind project, where crews are blasting rock and clearing land to erect dozens of wind turbines.

Despite "extreme fire hazard" conditions and a region-wide fire ban, a number of workers say crews continued to blast rock and use heavy machinery that had set off several small fires earlier last week. The workers asked CBC News to withhold their names out of fear of losing their jobs.

But on Wednesday, things got out of control.

"We heard on two-way radios that there was an Argo [an all-terrain vehicle] that broke down in the bush where the fire began," one worker said.

MY COMMENT
This composite fire map was drawn as of July 24th and I imagine the damage figures are much higher today. These four wildfires in Ontario had burned 88.844.5 hectares combined as of that date, which equates to 219,540 acres, or slightly more than the RANCH FIRE in Mendocino County.