Chicago faces an air quality alert due to Canadian wildfire smoke and high ozone levels, with risks for sensitive groups.

As the city's surface warms, it heats the air above it, causing that air to rise. This rising motion can pull in smoke-laden ...

As Canadian wildfire smoke lingers in the skies, the Chicago area will soon be under an air quality alert, but the smoke ...

While an air quality alert continues for parts of the Midwest due to smoke from Canadian wildfires, northeastern Illinois was ...

Smoke from Canadian wildfires continues to affect air quality across the Midwest, though Monday’s conditions were an ...

Health officials from Minnesota to Maine have issued alerts warning of poor air quality from wildfires burning in Canada.

Most of the Chicago area remains under an Air Quality Alert this weekend due to smoke from Canadian wildfires.

Wildfire smoke from Canada turned Chicago into one of the world’s most polluted metro areas as the Lollapalooza music ...

"The air quality is officially dangerous in Chicago," says Brian Urbaszewski, director of environmental health programs at ...

Every air quality monitor in Minnesota is reporting red or unhealthy conditions for everyone, an official said.

Smoke from Canadian wildfires has returned to Central Illinois bringing significant reductions in air quality to Central ...

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