About 350 residents were under mandatory evacuation orders because of the Hat Fire, which began Thursday near a highway.
When investigators went to question Clark he abrasively told them they weren't allowed on his property in Holy Jim Canyon, the flashpoint of the fire, Duff said.
More than 21,000 people have been evacuated in and around the city of Lake Elsinore, where flames and billowing smoke rose into the sky at the edge of the city of 60,000 near the Santa Ana Mountains.
Clark is being held pending bail of $1million.
Perseid meteor shower: 'TEARS of Biblical saint' to RAIN DOWN this weekend
Our advice? Bring a rug, a flask of tea (or, you know, whiskey - pick your poison) and some insect repellent, and get gazing. It takes 20 minutes pretty much for your eyes to adjust to the dark and then you'll say oh there's more of them now.
It was 49 percent contained with firefighters struggling in steep terrain to control the blaze, CalFire said. The so-called Holy Fire has chewed through 28 square miles (72 square kilometers) of dense chaparral and is only partially contained.
Beginning on 27 July, the Mendocino Complex fires are now burning in Mendocino, Lake and Colusa counties and have so far scorched over 300,000 acres of land and destroyed over 100 homes.
More than 600,000 acres across the state have been consumed by this year's fire season, which experts warn is growing longer each year.
Speaking at a dinner with business leaders on Wednesday, the president expressed his support for the families that have lost loved ones in the California fires, and said his administration was working closely with state and local authorities.
Here, you can see the vast swaths of burned vegetation underneath plumes of smoke from the Mendocino Complex Fire.
Susan Schroeder, spokeswoman for the Orange County district attorney's office, said her office would "bring him to justice for these awful crimes".
North Korea lashes out at U.S. diplomats over sanctions
North Korea has in the past expressed anger over comments made by administration officials in the media, especially Bolton.
Firefighters in California are battling 15 large fires.
"Crews worked throughout the night to reinforce containment lines while the fire behavior remained extreme". The firefighter told the Post that he had been reporting "problems" with Clark to the sheriff's office and U.S. Forest Service for more than three years, including the most recent text message he reportedly received from Clark.
Firefighters aided by cooler weather have made good progress against a blaze burning for almost a month near Yosemite National Park in the northern part of the state.
"We know this district burns, but it should never burn because of an intentional act".
A fire that broke out near the communities of Fairfield and Vacaville had destroyed a home and two other structures, according to the Vacaville Fire Department. The sprawling Mendocino Complex fire in Lake County, which became the largest in state history earlier this week, had grown to 304,402 acres as of Thursday morning, officials said.
Omarosa Makes Damning Claims Against Trump
She writes, she felt a "growing realization that Donald Trump was indeed a racist, a bigot and a misogynist". Since Trump was ever the germaphobe, I was shocked he appeared to be chewing and swallowing the paper.