A big swath of the U.S. is under red and purple air quality alerts from Canada's smoke

June 29, 2023
Wildfire smoke clouds the skyline on Wednesday in Chicago. The Chicago area is under an air quality alert as smoke from Canadian wildfires has covered the city.

In Madison, Wis., the air quality was measured at 242 Thursday morning— a "very unhealthy" purple alert rating that many other communities shared, particularly in the Midwest.

(Image credit: Scott Olson/Getty Images)



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