Canadian wildfire smoke returned to New Hampshire on Sunday, reducing air quality on an otherwise sunny and comfortably warm day. Overnight lows fall into the 50s with mostly clear and calm conditions ...

Smoke from Canadian wildfires has drifted into the Midwest and northeastern US, causing hazy skies and prompting air quality ...

Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air for at least the third day. Air quality alerts were in effect in Iowa, Minnesota, ...