June 5, 2023, 1:27 PM CDT By Denise Chow and Evan Bush Millions of people across the Midwest are under dangerous air quality conditions Monday, as smoke from wildfires in eastern Canada wafts over the region. Hazy skies have blanketed a wide swath of the country from the Ohio Valley to as far south as … Continue reading Air quality levels in parts of the U.S. plunge as Canada wildfires rage