Wildfires burning in Canada were causing unhealthy air quality across parts of North America on Monday.

Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air for at least the third day.

Blazes across several Canadian provinces and territories pose health risks to Canadians and their southern neighbours.

More than 700 active wildfires burning across Canada and about two-thirds are currently out-of-control

Wildfires burning in Canada were causing unhealthy air quality across parts of North America on Monday.

Forecasters say weak winds have left Canadian wildfire smoke to linger over the U.S. Stronger winds are expected to bring relief later in the week.

Hundreds of fires across Canada and parts of the US prompt alerts in 14 states from Great Lakes region to the north-east