About 200 residents have been allowed to return home.
The brush fire was 60-percent contained Wednesday afternoon and had burned 12 homes in nearly 15,000 acres.
Some of the more than 2,000 firefighters battling the flames overnight were released Wednesday.
The crash of a single-engine plane sparked flames Sunday. The crash killed Pomona resident Walter Johnson and Claremont resident John Nuckolls.
Twelve homes and 18 outbuildings were destroyed and three firefighters sustained minor injuries in the firefight.
At its worst, 650 houses were in the fire's path and more than 200 residents from homes closest to the flames were asked to leave.
The Associated Press contributed to this report.