More than 1,800 personnel are helping battle the more than 40,000 acre Miles Fire, which includes a series of fires burning on the border of Douglas and Jackson County.
The weather may pose difficulties for firefighters as temperatures rise to nearly triple digits and humidity levels drop Thursday, fire officials said.
Those conditions pushed the fire to Elk Creek Road and across Middle Creek. Firefighters worked through the night Wednesday, conducting burnouts, and locating and suppressing spot fires.
Saturday may provide a reprieve, as temperatures are predicted to drop into the 80s.
Firefighters are continuing to prepare homes along Highway 62. Additional homes along Elk Creek Road were given an evacuation notice on Tuesday.
The Miles Fire is expected to merge with the Columbus Fire, so firefighters are constructing contingency lines north and south of the blazes.
Fire managers are working with the Cow Creek Band of Umpqua Tribe of Indians to figure out how to protect a 10,000-acre special interest area.
Officials are urging Umpqua National Forest visitors to make sure their campfires are completely extinguished.
So far this month, there have been four abandoned fires that spread into small fires from embers that were still burning, according to Bill Blackwell, a public information officer for the Umpqua National Forest.
He said the concern is that those small fires could turn into something larger because of the hot and dry weather.
“It’s really critical that folks take the extra time to make sure the fires are out,” Blackwell said.
Campfires are prohibited outside of designated areas on national forestland.