Smoke from the Canadian wildfires has entered the United States, causing air quality to plummet and a thick brown haze blanketing the landscape.
Poor air quality has been a problem in New York since Wednesday, when a cloud of smoke descended near the ground.
Washington, D.C., had largely avoided dangerous air until a thick haze settled over the capital on Friday.
Chicago experienced some of the worst air quality in the country on Thursday and remains shrouded in clouds of smoke.
Wildfire smoke has been changing the skies across central Pennsylvania since Tuesday.
And on Wednesday, it completely engulfed the Minneapolis skyline.
This week, the skies in Grand Rapids, Michigan turned from blue to brownish-orange.
