Camp Pendleton Fire offiicals are monitoring a brush fire on the base that has grown to about 300 acres.
The blaze started near Range 210 in the 53 Area at about 1 p.m.
Crews have shut down Basilone Road in the area as firefighters respond.
The road is expected to remain closed for about three hours, and traffic control points have been set up to help drivers find an alternate route.
