As wildfires continue to ravage the western United States and Canada, authorities have issued numerous air quality alerts and evacuation orders to protect residents from the effects of the devastating blazes.

As of Wednesday, the National Interagency Fire Center reports that 79 large wildfires have scorched more than 1.4 million acres across the U.S., impacting states including California, Oregon, Arizona, and Washington. The crisis is compounded by severe air quality issues, prompting alerts across several states.

In the Northwest, evacuation orders are in place for 15 active fires. Meanwhile, Canada faces a significant wildfire crisis with approximately 430 fires in British Columbia and 177 in Alberta. Notably, two major fires have led to the evacuation of up to 25,000 visitors and residents from the largest national park in the Canadian Rockies.

The Oregon Department of Environmental Quality has issued air quality alerts for eastern counties including Harney, Malheur, Grant, Baker, and Morrow. Idaho's central counties of Ada, Canyon, Gem, Owyhee, Payette, and Washington are also under air quality advisories. In north central Washington, the Colville Reservation, all of Chelan County, and the Methow Valley extending to Brewster in Okanogan County are similarly affected. Additionally, Canadian authorities have issued an air quality advisory for Calgary, Alberta.

To mitigate the health risks posed by the smoke, residents are advised to stay informed about local air quality conditions and forecasts. Those with air conditioning systems are encouraged to replace filters frequently, with high-efficiency filters being the most effective against smoke particles. Portable air purifiers can also provide relief. During periods of poor air quality, staying indoors with windows and doors closed is crucial. If venturing outside is necessary, wearing a respirator mask, such as an N-95 or P-100, can offer some protection.