The largest wildfire in the US has burned almost 400,000 acres

The largest wildfire in the United States approached 400,000 acres burned with containment at just 38%, officials said Thursday.

The Bootleg Fire has charred 399,359 acres in southern Oregon, including some land that is set aside for carbon offsets.

“The fire will continue to be extremely active with gusty winds and extremely dry fuels,” says an update posted to InciWeb, the national clearinghouse for wildfire information.

Officials in recent days have touted progress against the massive fire, which was started July 6 by lightning.

“Fire crews and support personnel have made significant progress in containing this fire in the last few days,” Joe Prummer of the Northwest Interagency Incident Management Team said. “However, we still have a long road ahead of us to ensure the safety of the surrounding communities.”

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The blaze grew about 4,000 acres Thursday and officials said there was growth and activity in two areas but the advance was controlled with bulldozers.

It is now the third-largest fire in Oregon since 1900, Marcus Kauffman, spokesperson for Oregon Department of Forestry, told CNN’s Poppy Harlow on Thursday.

More than 2,100 people under some form of evacuation due to the fire, according to Kauffman.

Record-breaking, triple-digit temperatures and severe drought have devastated parts of Oregon. Those conditions have been fueling the fire and forcing evacuations.

Doug Grafe, chief of fire protection at the Oregon Department of Forestry, this week predicted a “long, difficult fire season.”

He said Tuesday – when the fire had burned 388,000 acres – it’s possible that another 50,000 to 100,000 acres could burn before the Bootleg Fire is contained.

“The future for us for the remainder of the season continues to look above normal dry and above normal temperatures,” Grafe said. “So this is not going to return to normal anytime soon.”

A ban on campfires will be banned in state parks and state-managed forests east of Interstate 5 started Thursday, the Oregon Parks and Recreation Department said. That covers all regions of the state except the Pacific coast and a portion of the Willamette Valley.

The ban includes not only charcoal and propane fires, but also tiki torches and even candles.

The Alisal Fire burns near Goleta, California, on Tuesday, October 12.

A firefighter puts out a roadside fire in Goleta, California, on Wednesday, October 13.

An air tanker drops retardant on a wildfire in Goleta.

James Grooms looks through the remains of his home at the Rancho Marina Mobile Home & RV Park following the Brannan Fire in Sacramento County, California, on Tuesday, October 12.

Firefighter Tyler McManigal battles the Alisal Fire in Gaviota, California, on October 12.

A forest of ashen trees stands in the wake of the Windy Fire, south of California Hot Springs, on September 27.

A volunteer attempts to evacuate horses to safety as the Windy Fire expands in California's Sequoia National Forest on September 25.

Operations Section Chief Jon Wallace looks at the General Sherman giant sequoia tree at Sequoia National Park on September 22. The base of the tree, the world's largest by volume, was wrapped in an aluminum-based burn-resistant material to protect it from wildfires.

Firefighters spray water as flames from the Windy Fire push toward a road in California's Sequoia National Forest on September 22.

Firefighters battling the Windy Fire extinguish a spot fire in the Sequoia National Forest on September 19.

The Windy Fire burns in the Trail of 100 Giants grove in the Sequoia National Forest on September 19.

A helicopter drops water on the KNP Complex Fire burning in Sequoia National Park on September 15.

Flames from the KNP Complex Fire burn along a hillside in the Sequoia National Park on September 14.

This aerial photo, taken on September 4, shows the Dixie Fire on Horton Ridge in Plumas County, California.

Riley Cantrell cries while she and boyfriend, Bradley Fairbanks, view what's left of her mother's home in Greenville, California, on September 4. It was destroyed by the Dixie Fire.

A firefighter is seen as the Caldor Fire rages near California's Silver Lake on September 2.

A helicopter flies over Wrights Lake while battling the Caldor Fire in California's Eldorado National Forest.

Embers fly from a tree as the Caldor Fire burns along Highway 50 in California's Eldorado National Forest.

Veronica Foster, an evacuee from South Lake Tahoe, California, hugs her dog, Gracie, as she and her co-workers gather outside an evacuation center in Gardnerville, Nevada, on August 31. The governors of California and Nevada declared states of emergency as the fast-moving Caldor Fire prompted officials to tell everyone to get out of South Lake Tahoe.

Jason Marone of the Roseville Fire Department hoses down a hot spot in Meyers, California, on August 31.

A tree burns in a blackened forest at dawn on August 30 after the Caldor Fire tore through Twin Bridges, California.

A firefighter winds up hose at a spot fire near Meyers, California, on August 30.

The Caldor Fire burns homes along a ridge near South Lake Tahoe on August 30.

South Lake Tahoe residents are stuck in gridlock while attempting to evacuate the city on August 30.

A tanker makes a fire-retardant drop near Lytle Creek, California, on August 26 as efforts continued to stop the South Fire.

A firefighter tries to extinguish flames at a burning house as the South Fire burned in Lytle Creek, California, on August 25.

From left, Astrid Covarrubias, Jose Lamas and Maria Covarrubias walk through smoke after visiting their burned-out home in Lytle Creek on August 25.

The French Fire continues to spread near Wofford Heights, California, on August 25.

Firefighters are seen behind the flames of a backfire they were setting to battle the French Fire near Wofford Heights.

Crews battle California's Caldor Fire as it moved east toward Lake Tahoe on August 23.

This aerial photo, taken on August 19, shows burned homes at the Creekside Mobile Home Park a day after they were destroyed by the Cache Fire in Clearlake, California.

Firefighters dig a containment line on the Caldor Fire near Pollock Pines, California, on August 18.

Smoke and haze from wildfires obscure the Golden Gate Bridge and the San Francisco skyline on August 18.

In this long-exposure photo, embers light up hillsides as the Dixie Fire burns near Milford, California, on August 17.

Destiney Barnard holds Raymond William Goetchius while stranded at a gas station in Doyle, California, on August 17. Barnard's car broke down as she was helping Raymond and his family flee the Dixie Fire.

Destroyed property is seen August 17 after the Caldor Fire passed through Grizzly Flats, California.

Firefighters spray water on trees being burned by the Dixie Fire near Janesville, California, on August 17.

As the KNP Complex Fire approaches, Forest Service firefighters Armando Flores, right, and Heron Hilbach-Barger clear vegetation around structures at the Ash Mountain headquarters in Sequoia National Park, Calif., on Sept. 15, 2021. The blaze is burning near the Giant Forest, home to more than 2,000 giant sequoias.

A firefighting helicopter flies in front of the sun, which was shrouded in thick wildfire smoke near Lakeview, Oregon, on August 15.

Wind blows smoke away for a moment, revealing damage from the Parleys Canyon Fire in Utah on August 14.

Crews battle a fire in Newhall, California, on August 12.

A table and chairs sit in front of a destroyed home in Greenville, California, on August 12.

A firefighter battles the Dixie Fire near Taylorsville, California, on August 10.

Smoke plumes rise from the Kwis Fire near Eugene, Oregon, on August 10.

A firefighter works to extinguish a controlled burn, a preventative measure, to protect a home in Greenville, California, on August 9.

Firefighters battling the Dixie Fire clear a fallen tree from a roadway in Plumas County, California, on August 6.

Flames from the Dixie Fire consume a pickup truck on Highway 89, south of Greenville, California, on August 5.

Operations Chief Jay Walter passes the historic Sierra Lodge as the Dixie Fire burns through Greenville, California, on August 4. The fire leveled multiple historic buildings and dozens of homes in central Greenville.

Firefighters work at a Greenville home that was engulfed by the Dixie Fire on August 4.

The Dixie Fire burns near Taylorsville, California, on July 29.

California Gov. Gavin Newsom, left, and Nevada Gov. Steve Sisolak tour an area destroyed by the Tamarack Fire in Gardnerville, Nevada, on July 28.

Firefighter Brentt Call walks through a burned-over area of the Bootleg Fire near Klamath Falls, Oregon, on July 27.

Cal Fire Capts. Tristan Gale, left, and Derek Leong monitor a firing operation in California's Lassen National Forest on July 26. Crews had set a ground fire to stop the Dixie Fire from spreading.

Firefighters try to reach a fire site in Quincy, California, on July 25.

Volunteers sort clothing at a donation shelter for those affected by the Bootleg Fire in Bly, Oregon.

Scott Griffin surveys his property, which was destroyed by the Bootleg Fire in Sycan Estates, Oregon.

Flames consume a home as the Dixie Fire tears through the Indian Falls community of Plumas County, California, on July 24.

People stand behind the fire line as flames from the Steptoe Canyon Fire spread through dry grass in Colton, Washington, on July 22.

Plumes of smoke from the Dixie Fire rise above California's Plumas National Forest, near the Pacific Gas and Electric Rock Creek Power House, on July 21.

Firefighters walk near a wildfire in Topanga, California, on July 19.

A firefighter does mop-up work in the Fremont-Winema National Forest, which has been struggling with the Bootleg Fire in Oregon.