Flames destroyed a vacant double-wide mobile home in Oasis, a spokeswoman said.
No one was hurt during the blaze in the 88700 block of Avenue 70 that was called in at 3:35 p.m., Riverside County Fire Department spokeswoman Melody Hendrickson said.
The fire engulfed the mobile home and a vehicle when firefighters arrived at the scene. Intense heat damaged a second vehicle, Hendrickson said.
Damage estimates were placed at $15,000. Firefighters contained the blaze by 4 p.m. but the cause is under investigation, Hendrickson said.