Officials said they've sent several crews to assist in controlling the massive wildfires, and they don't expect them to stop until Canada sees some snow.

Smoke from hundreds of wildfires in Canada is lingering over the northern U.S., spreading across to roughly a dozen states from Wisconsin to Maine.

Smoke from Canada’s raging wildfires has travelled over 5,000 kilometres across the Atlantic Ocean, reaching parts of Europe and blanketing cities with haze and black carbon. Over the past 24 hours, the eastern regions of the continent have reported hazy skies, prompting concerns about the far-reaching effects of wildfire emissions.