Smoke from widespread wildfires in Canada prompted air quality alerts across several Midwest and Northeast U.S. states this week.

The smoke is expected to remain over the northern and central Plains of the United States for the next couple of days, ...

As of 10 a.m., AirNow.gov listed an air quality index in Buffalo of 142, which means the air is unhealthy for sensitive ...

This morning, visible smoke from Canadian wildfires is drifting into New York, causing a spike in fine particles and leading ...

President Trump warned that it’ll be “very hard” to make a deal with Canada before Friday’s trade deadline after it ...