Fireworks can make bad air quality even worse. For some cities, the answer is drones
Detroit, Chicago and the Midwest blanketed by wildfire haze from Canada
Heat, storms and fire risk: Fourth of July weather is nothing to celebrate
A big swath of the U.S. is under red and purple air quality alerts from Canada's smoke
Air quality concerns in US will continue through summer due to Canada's wildfires
Rain may soon help put out flames in Canada's worst recorded wildfire season