Blazes across several Canadian provinces and territories pose health risks to Canadians and their southern neighbours.
Smoke from wildfires burning in Canada has triggered air quality alerts over the border in the United States.
Several blazes continued to rage across Canada on Saturday, sending smoke wafting over several states in the US Midwest and bringing warnings of unhealthy air for at least the third day.
Air quality alerts were in effect in the US states of Iowa, Minnesota, Wisconsin and Michigan, as well as eastern Nebraska and parts of Indiana and Illinois.
Conditions were especially dire in Minneapolis, Minnesota, with the Switzerland-based air quality monitoring database IQAir reporting that the US city had some of the worst air pollution in the world since Friday.
