The California Department of Forestry and Fire Protection has warned that "humidity recovery remains slow, continuing the increased fire danger."
Evacuation orders are in effect across parts of Napa County following the Glass Fire, which is zero percent contained.
Around 8,000 wildfires have burned over 3.6 million acres of California this year.
Claims that the fires were started by so-called leftist activists and members of antifa have been debunked by authorities.
Around 7,900 wildfires have burned over 3.4 million acres of California so far this year.
An air quality advisory remains in place for all of Oregon through Thursday.
Fire crews continue to protect the Mount Wilson Observatory, with the fire remaining active in the area.
The historic observatory houses around 50 buildings and several telescopes used by leading astronomers.
"Scientific American has never endorsed a presidential candidate in its 175-year history. This year we are compelled to do so," the editors wrote.
There are currently at least 13 "active large fires" in Oregon, according to the latest report from the National Interagency Fire Center.
Firefighters are battling 28 major fires across the state, several of which are less than 20 percent contained.
Nearly 17,000 firefighters were reported to be battling 29 major wildfires across the state as of Sunday.
More than half of the nearly 5.2 million acres burned by fires across the U.S. were reported to be in California.
Firefighters continue to battle 28 major fires acros the state, with the Creek, Bobcat, Slater and Willow fires reported to be zero percent contained.
Nearly 14,000 firefighters are battling 25 major wildfires, three of which have been zero percent contained, as of Tuesday evening.
Eight U.S. National Forests in California have been temporarily closed, while restrictions were announced for several others due to the threat of ongoing fires.
One person has died due to a medical issue amid the ongoing fire but there may be more casualties, the Fresno Fire Department warned.
The fire was reported to be at 50 acres, with zero percent contained, as of Monday evening.
"There is bad news—radiation is above normal in the fire's center," Yegor Firsov, head of Ukraine's ecological inspection service said.
Mandatory evacuation orders and warnings are in place in parts of Santa Barbara County following a wind-driven fire sparked in Los Padres National Park near Painted Cave Road.
Companies are burning forests and land year after year, with little recourse.
The intense wildfires that are hitting the region during this year's season are turning the sky a bloody red.
"If Brazil does not retreat from the course it is on, scientists warn there will come a time in the near future when Amazonian fires burn without control and push the forest to a point of no return," researcher Robert Walker said.
"The US has spent over $100 million on Trump's golf trips," journalist Jordan Uhl tweeted.
Boreal forests store one-third of all terrestrial carbon—but for how long?
Outspoken president's remarks came as smoke from the fires plunges São Paulo into darkness at 3 p.m.
Wildfires in British Columbia and California have blanketed the northwest U.S. in smoke, creating some of the most unhealthy air quality in the country.
Reports of a cloud of darkness blocking out the Sun at noon above northern Siberia have raised questions.