Ohio's Air Quality Advisory remains in effect as smoke from Canadian wildfires worsens conditions. Several parts of Northeast Ohio have reached 'hazardous' levels.

Chicago air quality was the worst in the world yesterday and wildfire smoke still blanketed the city Friday morning, but the AQI is expected to improve as the day goes on.

Philadelphia issued a "Code Red" air quality alert Thursday due to Canadian wildfire smoke, with air quality reaching "Very Unhealthy" levels and further warnings in effect for Friday.

Current Air Quality: Yesterday’s lake breeze helped keep the thickest plume of wildfire smoke at bay for much of Thursday afternoon. However, once the boundary retreated later in the day, denser smoke pushed back into the area,

Michigan's Department of Environment, Great Lakes, and Energy, or EGLE, has extended the Air Quality Alert for all of the state through Friday due to "Very Unhealthy to Hazardous" air quality conditions caused by smoke from wildfires in Canada and Minnesota.

With smoke from Canadian wildfires triggering air quality alerts across the Midwest, millions of people in cities like Chicago, Detroit and Milwaukee are becoming intimately familiar with the Air

Wildfire smoke from hundreds of miles away drifting into Erie is doing more than creating hazy skies; it’s raising health concerns across the region. For Thursday’s air quality, the Department of Environmental Protection issued a Code Purple for the Northwest PA region.

Wisconsin's air quality numbers are among the worst in the world. See the totals.