Infernos across California, Oregon and Washington state have burned more than five million acres (two million hectares) this year, killed dozens of people and forced hundreds of thousands from their homes.
While firefighters have made some progress this weekend on numerous blazes sweeping through the state, and officials have lowered evacuation requirements for some areas of Clackamas County, the Riverside fire is still a major area of concern, as is the abundance of wildfire smoke throughout the region. Trump is a "climate arsonist" and "climate denier", Biden said, and has "no interest in meeting this moment" and doing something to slow down global warming.
In Clackamas County south of Portland, Oregon relief crews dished out food to some of the tens of thousands of residents ordered to evacuate.
"The 16 large fires in OR total about 878,000 acres of fire, while the 13 large fires in Washington are at about 676,000 acres", according to the Bureau of Land Management office for those two states.
Experts, environmentalists and loggers largely agree that thinning trees and brush through prescribed burns and careful logging will help prevent forests that cover vast tracts of the American West from threatening cities with fire.
Authorities in California, where 25 people have died since 15 August, report that firefighters are working to contain 29 major wildfires across the state.
"Where you have lots of people living on small acreages close together, and you've got houses and barns and sheds and corrals and fences, it's very hard to do a prescribed burn", Gersbach said.
President Trump traveled to McClellan Park, Calif., on Monday afternoon, landing at a former air base near Sacramento to meet with Gov. Gavin Newsom and other officials.
Biden and Trump have offered vastly different visions when it comes to tackling the issue of climate change.
To that, Trump replied, "Absolutely". Trump responded, "Okay. It'll start getting cooler".
"It was worse than the Camp Fire, which I didn't think was possible".
Two Battalion Chiefs were also sent to Washington for military training for wildfire support.
Around Phoenix and Talent, some people set up food stations in parking lots, while others guarded homes from looters who tend to appear at dusk, according to a Reuters photographer.
He said seven people remained missing. "We submit the science is in and observed evidence is self-evident: that climate change is real and that is exacerbating this". "If this is not a signal to the United States, I don't know what it will take".
As the smoke that has been clogging the air and blocking heat from the sun begins to lift, firefighters expect the weather to heat up and fire activity could increase, the California Department of Forestry and Fire Protection said. The fire-friendly weather is the result of warm, dry and breezy conditions.
He recently called the threat of climate change "undeniable" and "existential".