In the rugged hills near California's Lake Hughes in Los Angeles County, the Lake Fire has grown to 10,000 acres and is 0% contained as of Wednesday evening. The fire was first reported at 3:40 p.m. and is spreading at a very rapid rate, according to fire officials.
"This robust number of resources will be placed strategically to protect homes that may come under fire threat," the Los Angeles County Fire Department said.
Temperatures in the area are in the 90s with humidity in the teens, according to the National Weather Service forecast office in Oxnard.
And in Colorado, the Grizzly Creek Fire has destroyed more than 3,200 acres and is 0% contained, according to the US Forest Service.
The fire crossed the Colorado River and Interstate 70 on Wednesday, prompting the interstate to shut down east of Glenwood Springs.
"This fire is in a really tough spot, and it's really tough to fight," White River National Forest supervisor Scott Fitzwilliams said during a community briefing Wednesday. There is no estimate yet of when the interstate could be fully reopened.
The fire ignited Monday and has spread quickly due to drought conditions. Some rural communities outside of Glenwood Springs are now under a "pre-evacuation" advisory.
The Grizzly Creek Fire is less than 100 miles from the Pine Gulch Fire to the southwest, which has destroyed more than 50,000 acres in less than a week. The Bureau of Land Management says it is 7% contained.
Nearly 900 people are working to contain the two fires. "We're going to be here for a while," said Fitzwilliams. "This fire is going to be here for a while."