Crews respond to Boulder Creek wildfire

BOULDER CREEK, Calif. (KTVU) - Crews are responding to a wildfire in Boulder Creek. 

The fire started as a structure fire that burned into vegetation. More structures are threatened. 

The fire has burned 20-25 acres and is zero percent contained. 

Evacuations are underway in Boulder Creek. 

Cal Fire is calling it the Bear Fire. 

Additional details have not yet been released.

Crews are expected to remain on scene into the weekend. 

Stay with KTVU.com for updates.