Crews battled a wind-fueled brush fire near Vacaville on Sunday afternoon that reached four alarms.
The fire, near the intersection of Hay and Dally roads, burned between 4 to 5 acres, according to Vacaville Fire Protection District Deputy Chief Dennis Fogleman.
The blaze was first reported at 10:53 a.m. No injuries were reported, and no structures were damaged.
As of 4 p.m., crews were still at the scene mopping up, Fogleman said.
The cause is under investigation.