Thousands of firefighters continue to battle deadly wildfires that have ravaged California for nearly a month

The Bobcat Fire burns in Angeles National Forest north of Monrovia, California, on Friday, September, 11.

George Coble walks through his destroyed property in Mill City, Oregon, on Saturday, September 12.

Crystal Sparks, 35, kisses her 4-year-old twins Chance and Ryder Sutton as they are evacuated from the Obenchain Fire in Butte Falls, Oregon, on September 11.

North Valley Disaster Group member Kari Zeitler and Butte County Animal Control officer Linda Newman bridle up two donkeys wandering along a roadside in Berry Creek, California, on September 11. The donkeys were displaced by the Bear Fire.

A firefighter shoots an incendiary device during a back burn to help control the Dolan Fire at Limekiln State Park in Big Sur, California, September 11.

Dora Negrete is consoled by her son Hector Rocha after seeing their destroyed mobile home in Talent, Oregon, on Thursday, September 10.

This aerial photo shows a destroyed mobile-home park in Phoenix, Oregon, on September 10.

A street is shrouded by smoke from wildfires in West Linn, Oregon, on September 10.

A tanker jet drops fire retardant to slow the Bobcat Fire in the Angeles National Forest north of Monrovia, California, on September 10.

Looking up San Francisco's Columbus Avenue, the Transamerica Pyramid and Salesforce Tower are covered with smoke from nearby wildfires on Wednesday, September 9. This photo was taken in the late morning.

Visitors of San Francisco's Dolores Park are seen under an orange sky darkened by smoke on September 9.

Wildfire smoke hangs over the San Francisco-Oakland Bay Bridge on September 9.

Bejhan Razi, a senior building inspector in Mill Valley, California, checks out repairs on a lamp-post clock as the sky is illuminated by nearby wildfires.

People stand in Alamo Square Park as smoke hangs over San Francisco on September 9.

People stop to take pictures of the Golden Gate Bridge as it is affected from smoke by nearby wildfires on September 9.

Firefighters cut defensive lines and light backfires to protect structures in Butte County, California, on September 9.

Flames shoot from a home in Butte County.

A Pacific Gas and Electric worker looks up at the advancing Creek Fire near Alder Springs, California, on Tuesday, September 8.

Lisa Theis unloads the last of her 44 alpacas after she evacuated her ranch in North Fork, California.

Flames burn at a home leveled by the Creek Fire in Fresno County, California.

A slide is melted at a school playground in Fresno County.

Firefighter Nick Grinstead battles the Creek Fire in Shaver Lake, California, on September 7.

A firefighter in Jamul, California, battles the Valley Fire on Sunday, September 6.

A fire encroaches Japatul Road in Jamul on September 6.

Little League baseball players warm up for a game near Dehesa, California, as the Valley Fire burns on September 6.

A firefighter watches the advancing Creek Fire in Shaver Lake.

A business owner in Shaver Lake walks next to kayaks he rents as smoke from the Creek Fire fills the sky on September 6.

Family members comfort each other as the El Dorado Fire moves closer to their home in Yucaipa, California, on September 6.

A firefighter sets a controlled burn with a drip torch while fighting the Creek Fire in Shaver Lake.

Dozens of evacuees are airlifted to safety on a California National Guard helicopter on Saturday, September 5. The Creek Fire had left them stranded in a popular camping area in the Sierra National Forest.

Firefighters walk in a line in Yucaipa on September 5.

Haze and smoke blanket the sky near Naches, Washington, as the Evans Canyon Fire burns on September 3.

California Gov. Gavin Newsom, right, listens as Santa Cruz State Park Superintendent Chris Spohrer talks about the fire damage to the Big Basin Redwoods State Park.

Randy Hunt packs up his belongings, including his daughter Natasha's first Pooh bear, left, in case he and his wife Sheli had to evacuate the home they rent in Middletown, California, on August 26.

Firefighter Juan Chavarin pulls down a burning tree trunk in Guerneville, California, on August 25.

A sign reading "Vaca Strong" adorns a charred hillside in Vacaville, California, on August 24.

Austin Giannuzzi cries while embracing relatives at the burned remains of their Vacaville home on August 23.

A firefighter looks out from a helicopter while battling the LNU Lightning Complex fires in Lake County, California.

Flames from the LNU Lightning Complex fires leap above Butts Canyon Road in Lake County on August 23.

Karol Markowski of the South Pasadena Fire Department hoses down hot spots while battling the CZU Lightning Complex fires in Boulder Creek, California, on August 22.

A burned-out vehicle is left in front of a destroyed residence as smoke fills the sky in Boulder Creek on August 22.

Smoke hangs low in the air at the Big Basin Redwoods State Park as some redwoods burn in Boulder Creek on August 22.

A firefighter watches the LNU Lightning Complex fires spread through the Berryessa Estates neighborhood in Napa County on August 21.

Veterinary technician Brianna Jeter comforts a llama injured by a fire in Vacaville on August 21. At right, animal control officer Dae Kim prepares to euthanize the llama.

Smoke from nearby wildfires hangs over San Francisco on August 21.

A firefighter monitors the advance of a fire in Boulder Creek on August 21.

Members of the US Forest Service discuss their next moves to battle the Grizzly Creek Fire near Dotsero, Colorado, on August 21.

People pack brown-bag lunches at an evacuation center in Santa Cruz, California, on August 21.

A smoke plume from the LNU Lightning Complex fires billows over Healdsburg, California, on August 20.

A firefighter battles flames in Santa Cruz County, California, on August 20.

Only scorched homes and vehicles remain in the Spanish Flat Mobile Villa in Napa County, California, on August 20.

Peter Koleckar reacts after seeing multiple homes burned in his neighborhood in Bonny Doon, California, on August 20.

A forest burns in Bonny Doon on August 20.

A man looks at a tree blocking his way after a fire ravaged Vacaville, California, on August 20.

A melted plastic fence lies on the charred ground after fire swept through Vacaville on August 20.

Sarah Hawkins searches through rubble after her Vacaville home was destroyed on August 20.

Fire crews maintain a backburn to control the River Fire near the Las Palmas neighborhood in Salinas, California, on August 19.

Gina Santos cries in her car after evacuating Vacaville on August 19.

People herd cows down Pleasants Valley Road in Vacaville on August 19.

Flames consume a home in Napa County, California, on August 19.

Embers burn along a hillside above Lake Berryessa as the LNU Lightning Complex fires tear through Napa County on August 18. This image was taken with a long exposure.

A resident runs into a home to save a dog while flames from the Hennessy Fire close in near Lake Berryessa on August 18.

A home burns as the LNU Lightning Complex fires tear through the Spanish Flat community in Napa County on August 18.

An air tanker drops retardant on fires in the Spanish Flat community of Napa County on August 18.

Flames from the Hennessy Fire consume a cabin at the Nichelini Family Winery in Napa County on August 18.

Tony Leonardini works on a spot fire as thunderstorm winds fan the Hennessy Fire in Napa County on August 17.

Smoke from the Grizzly Creek Fire is thick in Glenwood Canyon, near Glenwood Springs, Colorado, on August 16.

Kathy Mathison looks at the still-smoldering wildfire on August 16 that, just a day before, came within several feet of her home in Bend, Oregon.

Firefighters look at smoke and flames rising from the Ranch2 Fire in the San Gabriel Mountains, east of Los Angeles, on August 14.

A helicopter makes a water drop over the Ranch2 Fire in Azusa, California, on August 13.

A car is charred by the Lake Fire near Lake Hughes, 60 miles north of Los Angeles, on August 13.

A couple watches the Ranch2 Fire from a distance on August 13.

A firefighter crew works in Lake Hughes on August 13.

The Lake Fire burns a home in Angeles National Forest on August 13.

Flames and smoke from the Lake Fire rise on Wednesday, August 12.

A firefighter works against the Lake Fire on August 12.

Firefighters make an escape plan as the Lake Fire burns a hillside on August 12.

A tanker makes a drop on the Lake Fire on August 12.

A plume of smoke rises from the Lake Fire on August 12.

Fire crews battle the Grizzly Creek Fire near Glenwood Springs, Colorado, on August 11.