Wildfire smoke and unhealthy air persist and shift direction, as Trump demands explanation from Canada.

Wildfire smoke has settled thickly in parts of New York, Connecticut, Wisconsin, Michigan and Minnesota—and it’s heading further south.

States warned residents about air quality issues that could last for days

Wildfires in Canada and Minnesota are sending heavy smoke to the Midwest and Northeast U.S., causing poor air quality alerts.

A massive plume of smoke from wildfires burning across Canada has swept into the United States, degrading air quality across the Midwest, Northeast and Mid-Atlantic.

The smoke from the Canadian wildfires is causing air quality issues in the U.S. See where.

The wildfires are burning in Ontario, Canada, Minnesota, and nearby regions, with smoke already affecting cities in the Midwest.

Millions of Americans face air quality alerts from Minnesota to New York as authorities urge people to stay indoors

Large swaths of the US remain under air quality warnings

NEW YORK (AP) — Heavy, pungent smoke from Canadian wildfires darkened skies in the U.S. on Thursday, from the Great Lakes to parts of the East Coast, reducing visibility for

Air quality levels in Chicago, Detroitt and New York reached dangerously high levels on Tuesday as the US cities were shrouded in smoke produced by wildfires raging through…

The Manhattan skyline was obscured by thick haze and Chicago closed its beaches Thursday as out-of-control Canadian wildfires raged, sending smoke spewing into the United States…

A National Weather Service meteorologist said even if winds from the northwest clear skies as expected later this week, the smoky air could keep returning until the fires are out.…

A think blanket of hazardous wildfire smoke spread from the Great Lakes to the East Coast on Thursday, putting millions of Americans at health risk.

Orange skies and heavy smoke covered large parts of the U.S. on Thursday as Canada and Minnesota grapple with wildfires. Hazardous air quality is expected to continue.

NEW YORK: Heavy smoke from hundreds of wildfires in Canada enveloped a swath of the US from the Midwest to the...

US states near the Canadian border including Minnesota, Wisconsin, Michigan and Illinois were particularly choked, while the Northeast including New York was also experiencing…

Smoke from Canadian and Minnesota wildfires is expected to keep air quality unhealthy in parts of the Midwest and Northeast on July 17.

Heavy smoke from more than 800 wildfires burning across Canada enveloped a swath of the US from the Midwest to the Northeast on Thursday.

Wildfires in Canada are pouring thick clouds of smoke into the US and will usher in unhealthy air quality for millions of people in Northeast and Midwest.

Philadelphia issued a "Code Purple Air Quality Emergency Day" on Friday as very unhealthy air from the hundreds of Canadian wildfires travels down.