"There are areas of the Black Forest that we have not been able to get into at all to make any sort of assessment. So it's almost impossible to come up with another number, but it is safe to assume that that number will in fact rise," he said.
Ken Litch, a 12-year resident of the area, watched Wednesday as the Black Forest Fire gained ground on his home. There wasn't much else he could do.
"A hundred homes would be nothing," he told CNN affiliate KUSA. "Whatever is in its way, it's going to take."
The inferno is likely to continue for a couple more days as temperatures are forecast to stay in the 90s through Friday, with winds gusting up to 30 mph.
Famous bridge still intact
Another major fire in the state is the Royal Gorge Fire, which is burning 55 miles to the southwest, on the other side of Colorado Springs.
It burned several buildings around the iconic Royal Gorge Suspension Bridge, and threatened the bridge itself.
Authorities downgraded the number of acres burned from 3,800 to 3,100 late Wednesday. The wildfire was 20% contained, the state office of emergency management reported. Twenty structures have been lost to the flames.
"We have made good progress on the fire today without any accidents or injuries," said Dennis Page, incident commander for the fire.
The famous Royal Gorge Bridge that spans the Arkansas River is intact but needs to be inspected before it can reopen for tourists, a spokeswoman for the Royal Gorge Bridge and Park said.
The suspension bridge, which is 956 feet above the river and among the highest in the world, is made of more than 1,000 wooden planks.
"We did not know until today whether the bridge was still standing," Gorge Bridge and Park spokeswoman Peggy Gair said.
Gair says fire at the park burned a visitor's center, a tramway building, a carousel and several restaurants.
There were other fires in the state as well, including in Grand and Huerfano counties. Black Forest was the biggest of the blazes.