Six large fires have burned over 447,000 acres of Colorado, as of Tuesday, according to the National Interagency Fire Center.
More than 90,000 people have been told to evacuate areas south of Los Angeles, as fires burn more than 10,000 acres.
There are currently seven large active fires in Colorado, which have collectively burned at least 423,133 acres, as of Sunday.
There are five other large active fires in Colorado, which have collectively burned 232,358 acres, according to the National Interagency Fire Center.
The blaze was at around 19,000 acres Wednesday morning and expanded to over 30,000 acres by early evening, according to fire officials.
Several park and road closures have been announced in various parts of the area affected by the fire.
The California Department of Forestry and Fire Protection has warned that "humidity recovery remains slow, continuing the increased fire danger."
Fire suppression efforts in the West Zone of the August Complex Fire were hampered by "dangerously low humidity levels" on Monday, the California Department of Forestry and Fire Protection confirmed.
The four crew members on duty in Butte County were treated for injuries to their legs as well as heat exhaustion.
More than 16,500 firefighters are battling 23 major wildfires.
Fire activity in the Glass Fire area is projected to pick up following the Red Flag Warning in effect across the region.
The air quality is expected to remain "unhealthy" through Friday in the Northern Zone and Eastern Zone of the Bay Area.
A state of emergency has been declared across Napa, Sonoma and Shasta counties due to the Glass and Zogg fires.
Evacuation orders are in effect across parts of Napa County following the Glass Fire, which is zero percent contained.
There are around 64 wineries in the areas under evacuation orders and warnings in the Napa Valley region.
The Glass Fire is burning with "a dangerous rate of spread," the California Department of Forestry and Fire Protection confirmed.
The August Complex Fire is approaching California's Trinity Pines area, where there are reportedly up to 40 legal cannabis farms.
Over 18,200 firefighters continue to combat wildfires across the state.
Around 8,000 wildfires have burned over 3.6 million acres of California this year.
Over 7,900 California wildifres have burned more than 3.6 million acres of the state this year to date.
The Bobcat Fire in Los Angeles County has burned more than 103,000 acres of the state, as of Sunday.
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.
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.
At least 10 former college football players were among the people who died in the 9/11 terrorist attacks 19 years ago.
More than half of the nearly 5.2 million acres burned by fires across the U.S. were reported to be in California.
More than 26,000 firefighters and other support staff are battling at least 102 "active large fires" across 12 states.