Smoke from Canadian wildfires has impacted the air quality throughout United States, including in the northern High Plains, Midwest, Great Lakes, southern Mid-Atlantic and into the Northeast. This has ...

PHILADELPHIA (CBS) -- Air Quality Index (AQI) refers to the Environmental Protection Agency's scale regarding the health impact of air quality and pollution in the U.S., regulated under the Clear Air ...

Opening the weather map on an iPhone this week was a harrowing experience in the Lehigh Valley, as poor air quality due to Canadian wildfire smoke was showing up as ominous blobs of purple and even ...

Detroit, we have a code maroon! With the smoke from hundreds of Canadian wildfires wafting around the globe, millions of Americans are learning that, when it comes to air quality, there’s something ...

(The Hill) – Meteorologists struggled to explain “Smokeageddon,” the acrid campfire haze that settled over the East Coast and Midwest last month, and with good reason: It was unprecedented. Before ...