Air quality plummets as Canadian wildfire smoke stretches across the Midwest
Smoke from wildfires in Canada is again blanketing parts of the U.S. with a thick haze that's reduci...
air quality index
Purple is the new red: How alert maps show when we are royally ... hued
A version of this story originally ran on Feb. 5, 2021 This week, millions of Americans are anxiousl...
A haze is blanketing major swaths of the East Coast because of the Canadian wildfires
Millions of people along the East Coast and further inland woke up to a cloud of hazy air Wednesday ...