Mandatory evacuations are underway for people living in the Riviera West area.
The fire broke out this afternoon and it's burned for several hours, in a steep, heavily wooded area. Cal Fire has been attacking from both the ground and from the air.
So far, flames have burned at least 19 acres, 30-percent contained, and there are reports it might be two different fires burning near one another.
Wildfire burning in Lake County prompts evacuations
Stay with ABC7 News for updates on this developing story.