Environment Canada's air quality index has reported moderate to high risk since Saturday morning in Calgary, as many parts of the country struggle with the effects of wildfire smoke.

Smoke from the Canadian wildfires continues to bring potentially dangerous air quality to parts of the northern U.S., with hazy skies possible.

Smoke from wildfires raging in Canada has drifted into the United States, affecting air quality as far south as Florida.

RALEIGH, N.C. -- Over the weekend, a haze lingered in the North Carolina air, caused by wildfires in Canada that have forced thousands to evacuate across three provinces. The smoke has worsened air quality and reduced visibility in Canada and parts of the U.S,.