Smoke and grit from hundreds of forest fires have spread across large parts of Canada and the northern US, sending air quality across the Midwest and northeast US and Toronto to unhealthy levels.

Hazy with unhealthy air statewideWarmer and more humid later in the weekChance of showers/storms returning WAUSAU, Wis. (WSAW) - The past several days have featured smoke and haze across the Badger ...

Portland and the rest of the southern coast of Maine is under moderate conditions for Ozone Monday. Smoke from Canadian wildfires is being pushed through the state ahead of a cold front, according to ...

From British Columbia to the Northwest Territories and all the way east to New Brunswick, air quality alerts have been issued ...

Poor air quality is likely, along with obscured visibility. Use caution if doing strenuous activities, especially hiking. Tonight will be mostly clear and comfortable otherwise. Lows reach the 50s to ...

ALBANY — Smoke from Canadian wildfires will continue to worsen air quality across the region Monday morning and could reach ...

Tonight, there will be a south wind that will become east after midnight. Overnight lows will be near 60 degrees, and there ...

By Mitch Klein, Feven Gerezgiher and Juan Del Valle As result of severe wildfires in Canada, Minnesota is facing the longest air quality alert on record since the Minnesota Pollution Control Agency ...

Step outside and you'll probably smell it—smoke has been a major issue across much of Eastern Canada this weekend. Montreal ...

Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air.

Metro Detroit is looking at a mostly dry, warm, and increasingly humid week; but poor air quality remains a concern. Smoky ...

Wildfire smoke from Canada continues to linger across the state. An Air Quality Alert is still in effect throughout Wisconsin ...