Wildfire smoke chokes parts of Canada, western US; air quality a concern

Fires burning in California, Oregon, Arizona, Washington and other western states, as well as Canada, have filled the skies in regions of the western U.S. with smoke and haze, forcing some affected areas to declare air quality alerts or advisories.

As of Wednesday morning, there were 79 large active wildfires across the country being managed that have burned 1,431,460 acres (579,292 hectares), according to the National Interagency Fire Center. Evacuation orders are in effect for 15 fires in the Northwest, where fires continue to show active to extreme behavior. Communities near several fires in California, the Northern Rockies and the Great Basin are also under evacuation orders.

Where are the big fires? regon has 31 large active fires that have burned 791,653 acres (320,371 hectares). The Durkee Fire, the largest active blaze in the U.S., was burning near the Oregon-Idaho border and was 0% contained as of Wednesday morning and had burned nearly 400 square miles (1,036 square ...