UPDATE (Wed., August 21, 7:34 p.m.) - Santa Barbara County Fire's Public Information Officer, Scott Safechuck, says firefighters are continuing to mop up hot spots.
The Grade Fire has now burned 25.3 acres and is 80% contained.
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UPDATE (Wed., August 21, 10:40 a.m.) - As of Wednesday morning, the Grade Fire had burned 23.5 acres and was 80% contained. Forward progress of the fire was stopped Tuesday evening.
Firefighters are expected to remain on the scene mopping up hot spots throughout the day.
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UPDATE (5:17 p.m.) - Santa Babara County Fire officials say multiple spot fires are burning along Highway 101, the largest of which is about 15 acres.
Nearby agricultural fields are reportedly helping firefighters with perimeter control.
WATCH: Highway 101 brush fire timelapse
The cause of the fire is under investigation.
Old Coast Highway at Highway 101 is closed due to the fire.
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(4:57 p.m.) - Firefighters are responding to a fire along Highway 101 in the area of the Nojoqui Grade in Santa Barbara County.
The fire was first reported at about 4:30 p.m. along the northbound lanes.
According to the California Highway Patrol, there were initially reports of several small fires in the area.
Traffic through the area is being affected.
This is a developing story and will be updated with new information as it becomes available.