109 million people face another day of poor air quality as smoke from blazes in Ontario drifts over the USSign up for the Breaking News US newsletter email Tens of millions of Americans are enduring another day of smoky skies, irritated eyes and bad air quality, as Canadian wildfire smoke spread aga in over huge swathes of the US, affecting about 109 million people across the midwest, mid-Atlantic and north-east.The pungent wildfire blanketed cities such as Chicago and Detroit, where residents on Friday were warned to stay indoors and reduce activity levels after the air quality index reached a “hazardous” 361, according to the government website AirNow. Continue reading... ...read more read less