Residents returning to their homes are reminded to stay alert and vigilant about fire conditions, and to drive cautiously because firefighters are still in the area and apparatus are still on roadways, according to Cal Fire.
TIMELAPSE: Viewer captures flames consuming hillside in Napa County
As of Monday evening, the 2,490-acre Snell Fire was 45 percent contained.
The fire began at about 2:30 p.m. Saturday in grassy oak woodlands near the Berryessa Estates community. No structures have been damaged or destroyed, but 180 structures are threatened.
VIDEO: Flames burn out of control in Napa County
Cal Fire said 1,241 personnel are fighting the wildfire.
The cause of the fire is under investigation.
Get the latest stories and videos on wildfires burning across California, here.