YREKA, Calif. (AP) — Major wildfires in California and Montana grew substantially as firefighters protected remote communities on Sunday as hot, windy weather across the tinder-dry U.S. West created the potential for even more spread.

A firetruck drives along California Highway 96 as the McKinney Fire burns in Klamath National Forest, Calif., Saturday, July 30, 2022. (AP Photo/Noah Berger)
© Provided by Associated PressA firetruck drives along California Highway 96 as the McKinney Fire burns in Klamath National Forest, Calif., Saturday, July 30, 2022. (AP Photo/Noah Berger)
A horse grazes in a pasture as the McKinney Fire burns in Klamath National Forest, Calif., Saturday, July 30, 2022. (AP Photo/Noah Berger)
© Provided by Associated PressA horse grazes in a pasture as the McKinney Fire burns in Klamath National Forest, Calif., Saturday, July 30, 2022. (AP Photo/Noah Berger)

The McKinney Fire was burning out of control in Northern California’s Klamath National Forest as erratic lightning storms swept through the region just south of the Oregon state line, said U.S. Forest Service spokesperson Adrienne Freeman.

A deer swims across the Klamath River as flames burn the opposite bank in Klamath National Forest, Calif., on Saturday, July 30, 2022. (AP Photo/Noah Berger)
© Provided by Associated PressA deer swims across the Klamath River as flames burn the opposite bank in Klamath National Forest, Calif., on Saturday, July 30, 2022. (AP Photo/Noah Berger)

“The fuel beds are so dry and they can just erupt from that lightning," she said. “These thunder cells come with gusty erratic winds that can blow fire in every direction.”

The blaze exploded in size to more than 80 square miles (207 square km) just two days after erupting in a largely unpopulated area of Siskiyou County, according to a Sunday incident report. The cause was under investigation.

A second, smaller fire just to the west that was sparked by dry lightning Saturday threatened the tiny town of Seiad, Freeman said. About 400 structures were under threat from the two California fires.

In northwest Montana, a blaze sparked in grasslands near the town of Elmo grew to more than 11 square miles (28 square km) after advancing into forest. Temperatures in western Montana could spike to 96 degrees (36 Celsius) by Sunday afternoon with strong winds, the National Weather Service said.

A man runs to a truck as a wildfire called the McKinney fire burns in Klamath National Forest, Calif., on Saturday, July 30, 2022. (AP Photo/Noah Berger)
© Provided by Associated PressA man runs to a truck as a wildfire called the McKinney fire burns in Klamath National Forest, Calif., on Saturday, July 30, 2022. (AP Photo/Noah Berger)

A portion of Highway 28 between Hot Springs and Elmo was closed because of the thick smoke, according to the Montana Department of Transportation.

Related video: Wildfires prompt evacuations in California as millions in U.S. under heat warnings

Loaded29.82%
Current Time 0:01
Duration 2:00
Wildfires prompt evacuations in California as millions in U.S. under heat warnings
0

Roughly 200 miles (320 km) to the south, Idaho residents were under evacuation orders Saturday as the Moose Fire in the Salmon-Challis National Forest charred more than 67.5 square miles (174.8 square km) in timbered land near the town of Salmon. It was 17% contained Saturday.

California Gov. Gavin Newsom declared a state of emergency Saturday as the McKinney Fire intensified. The proclamation allows Newsom more flexibility to make emergency response and recovery effort decisions and access federal aid.

Angela Crawford walks past her home as a wildfire called the McKinney fire burns above it in Klamath National Forest, Calif., on Saturday, July 30, 2022. Crawford and her husband stayed, as other residents evacuated, to defend their home from the fire. (AP Photo/Noah Berger)
© Provided by Associated PressAngela Crawford walks past her home as a wildfire called the McKinney fire burns above it in Klamath National Forest, Calif., on Saturday, July 30, 2022. Crawford and her husband stayed, as other residents evacuated, to defend their home from the fire. (AP Photo/Noah Berger)

California law enforcement knocked on doors in the towns of Yreka and Fort Jones to urge residents to get out and safely evacuate their livestock onto trailers. Automated calls were being sent to land phone lines as well because there were areas without cell phone service.

Scientists say climate change has made the West warmer and drier in the past 30 years and will continue to make weather more extreme and wildfires more frequent and destructive.

The Pacific Coast Trail Association urged hikers to get to the nearest town while the U.S. Forest Service closed a 110-mile (177-km) section of the trail from the Etna Summit to the Mt. Ashland Campground in southern Oregon.

In Hawaii, the Maui County Emergency Management Agency said a brush fire was 90% contained but a red flag warning was in effect for much of Sunday.

A scorched pickup truck rests on California Highway 96 in Klamath National Forest, Calif., as the McKinney Fire burns nearby, Saturday, July 30, 2022. (AP Photo/Noah Berger)
© Provided by Associated PressA scorched pickup truck rests on California Highway 96 in Klamath National Forest, Calif., as the McKinney Fire burns nearby, Saturday, July 30, 2022. (AP Photo/Noah Berger)
Flames from the McKinney Fire consume trees along California Highway 96 in Klamath National Forest, Calif., Saturday, July 30, 2022. (AP Photo/Noah Berger)
© Provided by Associated PressFlames from the McKinney Fire consume trees along California Highway 96 in Klamath National Forest, Calif., Saturday, July 30, 2022. (AP Photo/Noah Berger)
A scorched pickup truck rests on California Highway 96 in Klamath National Forest, Calif., as the McKinney Fire burns nearby, Saturday, July 30, 2022. (AP Photo/Noah Berger)
© Provided by Associated PressA scorched pickup truck rests on California Highway 96 in Klamath National Forest, Calif., as the McKinney Fire burns nearby, Saturday, July 30, 2022. (AP Photo/Noah Berger)
A horse grazes in a pasture as the McKinney Fire burns in Klamath National Forest, Calif., Saturday, July 30, 2022. (AP Photo/Noah Berger)
© Provided by Associated PressA horse grazes in a pasture as the McKinney Fire burns in Klamath National Forest, Calif., Saturday, July 30, 2022. (AP Photo/Noah Berger)
Scorched vehicles and residences line the Oaks Mobile Home Park in the Klamath River community as the McKinney Fire burns in Klamath National Forest, Calif., Saturday, July 30, 2022. (AP Photo/Noah Berger)
© Provided by Associated PressScorched vehicles and residences line the Oaks Mobile Home Park in the Klamath River community as the McKinney Fire burns in Klamath National Forest, Calif., Saturday, July 30, 2022. (AP Photo/Noah Berger)
Angela Crawford watches as a wildfire called the McKinney fire burns a hillside above her home in Klamath National Forest, Calif., on Saturday, July 30, 2022. Crawford and her husband stayed, as other residents evacuated, to defend their home from the fire. (AP Photo/Noah Berger)
© Provided by Associated PressAngela Crawford watches as a wildfire called the McKinney fire burns a hillside above her home in Klamath National Forest, Calif., on Saturday, July 30, 2022. Crawford and her husband stayed, as other residents evacuated, to defend their home from the fire. (AP Photo/Noah Berger)
Angela Crawford leans against a fence as a wildfire called the McKinney fire burns a hillside above her home in Klamath National Forest, Calif., on Saturday, July 30, 2022. Crawford and her husband stayed, as other residents evacuated, to defend their home from the fire. (AP Photo/Noah Berger)
© Provided by Associated PressAngela Crawford leans against a fence as a wildfire called the McKinney fire burns a hillside above her home in Klamath National Forest, Calif., on Saturday, July 30, 2022. Crawford and her husband stayed, as other residents evacuated, to defend their home from the fire. (AP Photo/Noah Berger)