Firefighters struggle to contain McKinney wildfire, California's largest this year

Crews battling the largest wildfire so far this year in California braced for thunderstorms and hot, windy conditions that created the potential for additional fire growth Sunday as they sought to protect remote communities.

The McKinney Fire was burning out of control in Northern California's Klamath National Forest, with expected thunderstorms a big concern Sunday just south of the Oregon state line, said U.S. Forest Service spokesperson Adrienne Freeman.

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

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

The blaze torched trees along California Highway 96, and the scorched remains of a pickup truck sat in a lane of the highway. Thick smoke covered the area and flames burned through hillsides in sight of homes.

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. Authorities have not confirmed the extent of the damage yet, saying assessments would begin when it was safe to reach the area.

A third fire, which was on the southwest end of the McKinney blaze, prompted evacuation orders for around 500 homes Sunday, said Courtney Kreider, a spokesperson with the Siskiyou County Sheriff's Office.

The office said crews had been on the scene of the fire since late Saturday but that the fire Sunday morning "became active and escaped its containment line."

Several people in the sheriff's office have been affected by evacuation orders due to the fires "and they're still showing up to work so, (a) very dedicated crew," she said. A deputy lost his childhood home to fire on Friday, she said.

As the McKinney fire threatened, some residents chose to stay behind while others heeded orders to leave.

Larry Castle and his wife, Nancy, were among about 2,000 residents of the Yreka area under evacuation orders. They left Saturday with some of their prized possessions, including Larry's motorcycle, and took their dogs to stay with their daughter near Mount Shasta.

Larry Castle said he wasn't taking any chances after seeing the explosive growth of major fires in recent years.

"You look back at the Paradise fire and the Santa Rosa fire and you realize this stuff is very, very serious," he told the Sacramento Bee.

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.