"It will start getting cooler".
After the governor took a tour of the emergency animal center that was set up at Camelot, he addressed climate change as the reason fire season lasts longer, which in turn makes fires more destructive and stretches resources thinly across the state.
Another former Trump administration official, ex-Department of Homeland Security Chief of Staff Miles Taylor, said Trump's disdain for the state with the largest economy in the USA extended not just to the elected officials in charge, but to the people who vote for them.
The president and his administration have sought to pin the blame for the large wildfires on state officials, saying fuel-choked forests and scrub need to be thinned, more firebreaks need to be cut and flammable debris cleared from forest floors.
Trump has been fixated on "forest management" ever since 2018, when he first claimed that Finnish President Sauli Niinistö had told him Finns don't have the same problems with their forests because they, in Trump's words, "spend a lot of time on raking and cleaning and doing things".
"When trees fall down, after a short period of time. about 18 months, they become really dry".
Calling Trump a "climate arsonist", Biden said: "If we have four more years of Trump's climate denial, how many suburbs will be burned by wildfires?" Biden said that the real threat to the suburbs are wildfires, floods, and hurricanes.
"This is a wake-up call for all of us that we've got to do everything in our power to tackle climate change", the Democratic governor said.
The blazes across California, Oregon and Washington state have burned more than five million acres (two million hectares), torching an area roughly the size of the state of New Jersey, with fears the death count may rise.
The president's visit is to last only a few hours, before he heads to Arizona to return to the campaign trail.
Trump has blamed poor forest management for the deadly fires, though numerous blazes have roared through coastal chaparral and grasslands, not forest.
But he said the overwhelming cause of the problem is far bigger.
"The hots are getting hotter".
"We want to work with you to really recognize the changing climate and what it means to our forests".
The governor also pushed back on Trump's perspective that climate change is not the primary cause of fires.
At least 25 people have perished in California wildfires since mid-August, and one fatality has been confirmed in Washington state.
Trump has made little comment about the blazes in recent weeks, but at a Nevada campaign event on Saturday he acknowledged the scope of the disaster.
Much of the West Coast remained coated in dense smog on Monday, with Portland the world's most air-polluted city according to IQAir.
In Washington state, a prescribed burning program hasn't yet begun on state lands, said Department of Natural Resources spokesman Thomas Kyle-Milward. "We must come together around science to build a better future for all Americans".
Most of the fatalities have occurred in California and OR, with emergency services in the two states recording 26 deaths.
Warnings of strong winds that could fan the wildfires on the West Coast have added urgency to firefighters' efforts.
Residents of Arcadia, on the outskirts of Los Angeles, were ordered to evacuate Sunday as the nearby Bobcat Fire spread south through forested terrain toward the metropolis. "I thought the Camp Fire was enough, but I guess not".
Seventy-five thousand people in Linn County, Iowa were still without power; nearly every building in Cedar Rapids, Iowa was damaged in some way (with more than 1,000 homes declared uninhabitable); and with trash pickup halted, animals were scavenging through the bags of rotting garbage piling up in the streets.