(CNN) -- Firefighters working to extinguish a spreading California brush fire anticipate strong winds will fuel the blaze, which already has damaged property and injured one person, a fire official told CNN.
The 600-acre blaze in west California, which is being called the Loma Fire, was 20 percent contained Sunday, authorities said.
Strong winds continued to spur growth of the blaze, which first sparked about 3 a.m. (6 a.m. ET) Sunday in an unincorporated area in Santa Cruz County.
"It is heavily populated, and most of the homes are located in the hills of the Santa Cruz mountains," said California Department of Forestry and Fire Protection spokeswoman Colleen Baxter.
One person was reported injured, she said.
Police ordered a mandatory evacuation for some residents nearby, the Santa Cruz Sheriff's Office told CNN.
Baxter said about 940 fire personnel responded to the blaze, which burned one trailer and two outbuildings.
Fire officials expect the blaze to grow because of growing offshore winds, she said.
The cause of the Loma Fire is still being investigated.