Canadian authorities have evacuated more than 26,000 residents in three Canadian provinces, where dozens of wildfires are still active.About 17,000 people had been evacuated in Manitoba by Saturday, along with 1,300 in Alberta, whilst about 8,000 people were evacuated in Saskatchewan, where officials warned the number could rise.The smoke increased air pollution and reduced visibility in Canada and some US border states.In some parts of the US, air quality has reached unhealthy levels in North Dakota and small areas of Montana, Minnesota, and South Dakota.
