UPDATE (6:35 p.m.) - Santa Barbara County Fire said all evacuation orders will remain in effect overnight.
The Santa Barbara County Sheriff's Office reports that at least 30 homes near Alegria Canyon and Agua Caliente Canyon have been evacuated so far.
Santa Barbara County Fire reports that the fire is 5% contained and over 100 acres in size.
Fire crews will remain on scene battling the blaze on the ground.
Santa Barbara County Fire said a big obstacle for firefighters are gusty winds.
Aircraft operations will resume its work on Sunday morning.
UPDATE (6:35 p.m.) - Santa Barbara County Fire reports that the fire is now 5% contained, and over 100 acres.
UPDATE (5:00 p.m.) - Santa Barbara County Fire reports the Hollister Fire has grown to almost 100 acres and is 0% contained.
The agency said the wildfire is in Alegria Canyon near Hollister Ranch and Alegria roads, but it is hard to get there by foot. They are relying on attacking from the sky with special aircraft.
Another major challenge for fire crews are winds.
The National Weather Service issued a wind advisory for the south coast and mountains in Santa Barbara County. Wind gusts of 35 to 45 miles per hours are expected. The advisory will remain in effect through Monday at 3 a.m.
Several units are on scene including Montecito Fire and Vandenberg.
The cause of the fire is under investigation.
UPDATE (3:30 p.m.) - Santa Barbara County Fire continues at the scene battling the Hollister Ranch, which according to the agency, remains at 50 acres.
The Santa Barbara County Sheriff's Office reports that at least 30 homes have been evacuated so far.
California Highway Patrol confirmed that the Gaviota State Beach Road off ramp off of Highway 101 is closed.
Santa Maria Fire Department sent an engine to assist. Aircraft is also being used to fight this blaze.
This is a developing story.
UPDATE (1:35 p.m.) - Santa Barbara County Fire is on the scene of the reported 50-acre vegetation fire on Hollister Ranch.
Structures in the area are threatened, and resources are en route, including aircraft.
ORIGINAL STORY: Firefighters were responding to a large vegetation fire off the Gaviota coast Saturday afternoon.
It was reported around 11:45 a.m. on the 100 block of Hollister Ranch Rd.
A large plume of smoke could be seen from the Lompoc area.
Stay with KSBY and KSBY.com for information as it becomes available.