Canadian wildfire smoke is pouring over the U.S. border again as 11 new fires burn across British Columbia.

A state of emergency was declared in British Columbia Saturday, forcing thousands living around the Summerland area to evacuate their homes.

The largest of the regional fires has been dubbed the Bald Range Fire, and it had burned more than 33,000 acres by Sunday, according to The Washington Post.

As it did earlier this summer, fires from the Canadian wildfires have produced toxic smoke that is now billowing over the border and south into the U.S.

NOAA imaging shows wildfire smoke coverage in eastern Washington, Idaho, parts of Montana, Wyoming, northern Utah, northern Nevada, eastern Oregon, and northeastern California.

The impacted areas will see the smoke until midweek, forecasters say.

Air quality in the affected portion of the northwestern U.S. ranged from "unhealthy for sensitive groups" in Wyoming and southern Montana to hazardous in northeastern Washington, including Spokane.

The toxic clouds gave the region a hazy, orange hue over the last few days.

Nadège Dubuisson, a public health program supervisor with Multnomah County, told the New York Times that the wildfire haze is likely going to become a new normal for the region's summers.

“This is a good reminder that our summers are changing,” she said. “This is probably going to be our new reality, and we need to kind of be helping everybody get smoke-ready and wildfire-prepared.”

The smoke has already forced a number of cancellations in Spokane. The Spokane Indians canceled their scheduled Northwest League baseball games against the Eugene Emeralds, citing the air quality, according to The Spokesman-Review.

Country star Luke Bryan, who was also scheduled to play on Friday and Saturday, canceled both of the outdoor shows due to the poor air quality. He explained in a video that he had been "really, really" struggling during a show he played in Bend, Oregon, on Thursday due to the wildfire smoke.

According to IQAir, the poor air quality in Spokane will remain at either unhealthy for sensitive groups or unhealthy for the remainder of the week.

The smoke coverage comes just under a month after the Midwest and the East Coast were similarly blanketed with a toxic haze from Canadian wildfires.

Between July 18 and 20, smoke from fires in central and eastern Canada covered a stretch of the U.S. ranging from Illinois and Michigan in the Midwest to New York and Virginia in the East.

The coverage prompted an angry letter from Michigan Republicans accusing Canada of failing to do enough to prevent wildfires and mitigate smoke migration that affects their constituents. President Donald Trump has also threatened Canada over the wildfire smoke.