Why is the sky yellow in Boston? Canadian Wildfires turn skies orange across the US as thick smoke raises air quality concerns, nearly 100 million affected

Canadian Wildfires: Residents across parts of the northeastern United States woke up to an unusual sight this week a yellow sky, an orange sun and hazy conditions due to wildfire smoke from northern Minnesota and western Ontario. If you've been wondering why the sky is yellow right now, the answer lies hundreds of miles away in Canadian wildfires, which continue to send massive plumes of smoke across North America.

The smoke coming from wildfires burning in Canada has spread over much of the northeast, including parts of New York City, where temperatures neared 100 degrees on Wednesday.