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.

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 ...

Smoke from the Gifford Fire in Santa Barbara County has drifted east into the Victor Valley and High Desert region. The wildfire was first reported on Friday, August 1, along Highway 166 ...

An air quality advisory is in effect until at least noon Monday for all of Wisconsin because of the Canadian wildfire smoke.