Two of Oregon’s largest wildfires were likely to merge Friday, triggering new evacuations south of Portland in a state that has already evacuated about 10% of its population. All told, an estimated 500,000 people had evacuated in Oregon and that number kept growing overnight. Fire officials said the Beachie Creek and Riverside fires were likely to merge in Clackamas County. “We fully expect those two fires to combine,” Doug Grafe, chief of fire protection at the Oregon Department of Forestry, told the Oregonian. “This fire will continue to push near Molalla. We really need these winds to stop for the forward spread to stop.” As a result, Molalla, a town of 8,000-plus about 20 miles south of the Portland area, was ordered to evacuate. In California, seven more people were found dead in the North Complex Fire, formerly known as the Bear Fire, bringing the total killed to 10. It’s now the deadliest fire this year in California and is tied for 10th deadliest in state history. Four people were hospitalized with critical burns and 26 others are still missing. In total, at least 17 people have been killed in the recent fires in California, Oregon and Washington. Here’s a look at some of the major fires raging in parts of the West. California The North Complex Fire, one of 29 major blazes scorching California, has burned more than 394 square miles in the Plumas National Forest northeast of San Francisco. Thousands of homes are thought to have been destroyed in the fire, and more than 22,000 structures are still threatened, including buildings in Oroville and Paradise. The fire has gutted the small towns of Berry Creek and Feather Falls. It is burning in Butte, Yuba and Plumas counties. More than 20,000 people were under evacuation orders or warnings in the three counties. Butte County Sheriff’s Capt. Derek Bell said Thursday that seven more bodies were discovered, bringing the total to 10 in two days. At least four people with critical burns were hospitalized. Searchers are looking for 26 people who haven’t been heard from, according to the Seattle Times. The Siskiyou County Sheriff’s Office said there have been two deaths in the Slater Fire, burning along the California-Oregon border near Happy Camp. A second death was confirmed in the Slater Fire on Thursday, KRCR-TV reported, just one day after the first death was reported from the blaze. The Creek Fire, which has been burning for a week in Fresno and Madera counties, ignited a bunker where explosives used to prevent avalanches were stored, KFSN reported. No one was injured when the explosives went off in the bunker, which was part of the China Peak Mountain Resort near Huntington Lake. The Creek Fire has consumed 275 square miles. More than 4,844 square miles — or 3.1 million acres — have burned in California this year, more than in any other fire season in the state’s recorded history. Six fires this year are on the top 20 list of largest fires in state history, including the largest: the August Complex Fire, burning 736 square miles across five counties, Glenn, Mendocino, Lake, Tehama and Trinity. Because of the widespread fires, the U.S. Forest Service announced a temporary closure of all 18 national forests in the state. Oregon At least 38 active fires have burned more than 1,250 square miles in Oregon, according to the state Office of Emergency Management. The number of acres that have burned in the state in the last three days is almost double the amount that typically burns in an entire year, according to the Oregonian. “We have never seen this amount of uncontained fire across the state,” Gov. Kate Brown said. At least four deaths in Oregon have been blamed on the fires. -Wyatt Tofte, 13, and his grandmother Peggy Mosso were killed by fires burning southeast of Salem, the Oregonian reported. -A body was found at a BMX bike park in Ashland in Jackson County, where the Almeda Fire started, KGW-TV reported. Rich Tyler of the Oregon State Fire Marshal’s Office told the Oregonian another body was found Wednesday evening. He said it’s not clear who the people were or how exactly they died. Their deaths are still being investigated. Meanwhile, the Beachie Creek Fire – which has also been called the Santiam Fire – and the Riverside Fire have consumed more 478 square miles, said Grafe. (MORE: ‘I’ll Never Go Back’: Western Wildfires Quotes and Key Numbers) As the two fires moved toward merging Thursday afternoon, firefighters were told to disengage from the Riverside Fire and help with evacuations, KATU-TV reported. The U.S. Forest Service also said the pause gave firefighters “time to move to safety and reassess extreme conditions.” After residents of Molalla and other parts of Clackamas County were ordered to evacuate or be ready to go at a moment’s notice, the streets of Oregon City clogged with traffic. Parking lots filled throughout the afternoon. “Now, as of this afternoon, they’ve been told, essentially, they need to find somewhere else to go,” Oregon City Commissioner Rachel Smith told KATU. The city of Estacada, 30 miles outside the Portland metro area, also ordered residents to evacuate. Multnomah County officials worked Thursday night to open the Oregon Convention Center in Portland as a shelter. In Jackson County, the Almeda Fire devastated the towns of Talent and Phoenix. Officials estimated 1,000 homes were burned in Phoenix and 600 were lost in Talent, the Oregonian reported. The small city of Gates, near the border of Marion and Linn counties, was all but destroyed, residents told the Oregonian. Mill City, Mehama, Lyons and Detroit also have seen major damage. The Holiday Farm Fire has burned more than 225 square miles in Lane County and is about 12 miles outside of the Eugene-Springfield area. The community of Blue River, home to about 800 people, has seen severe damage. “There is just catastrophic damage, communities completely wiped out,” Lane County Commissioner Heather Buch told the Oregonian. “It’s devastating.” Meanwhile, an air quality monitoring website on Friday listed Portland, Oregon, as having the worst air in the world, The Oregonian reported. IQAir.com, which ranks air pollution across nearly 100 cities internationally, gave Portland an overall air quality index of 239. The U.S. Environmental Protection Agency’s website listed Portland’s measurement Friday as even higher, at 349. IQAir listed San Francisco in second place with an air quality index of 186 and Seattle was third at 172. Washington The wildfires have scorched more than 930 square miles in Washington, Gov. Jay Inslee said Thursday. The Cold Springs and Pearl Hill fires alone have burned more than 540 square miles in Okanogan and Douglas counties, according to the Seattle Times. More than 120 homes have been destroyed, including at least eight in Graham, about 15 miles southeast of Tacoma. A “super-massive” smoke plume from the fires in Oregon and California is expected to create unhealthy air conditions in Western Washington on Friday. On Thursday, Ed Townsend, fire chief of Okanogan County Fire District 8, pointed to a map of the area around Omak, in extreme north-central Washington about 40 miles south of the Canadian border. “Everybody inside here lost 100%,” he told the Seattle Times. “It’s catastrophic enough where we have got to start from the ground up.” Townsend had a gruesome task ahead of him. “We are out assessing animal losses and putting animals down. That’s today’s project – shooting cows – and injured animals, wildlife, bears,” he said. One death has been attributed to the fires in Washington. A 1-year-old boy died and his parents were severely burned while fleeing the Cold Springs Fire in Okanogan County, the Seattle Times reported.