UPDATE (10:34 p.m.) - CAL FIRE SLO is still working to strengthen containment lines and mop up.
The fire is now at 236 acres and 85-percent containment.
UPDATE (7:13 p.m.) - CAL FIRE reports the fire is now 50 percent contained.
UPDATE: (5:09 p.m.) - Forward progress of the fire has been stopped, according to CAL FIRE SLO. The fire is now approximately 90 acres in size and 25-percent contained.
All aircraft have been released back to Paso Robles and Santa Maria, according to CAL FIRE SLO.
UPDATE (4:22 p.m.) - Aircraft arriving at scene report the fire has the potential to burn 1,000 acres.
UPDATE (4:06 p.m.) - Firefighters are reporting that the first of two vegetation fires that broke out in the California Valley area Thursday afternoon has grown to more than 50 acres and is burning at a dangerous rate of spread. They say the fire has the potential to grow to 500 acres.
The fires were first reported at about 3:30 p.m. in the area off Highway 58 and Seven Mile Road.
(3:56 p.m.) - CAL FIRE SLO is responding to two vegetation fires in the California Valley near Belmont Trail and Bend Roads.
The first fire is reported to be 10 acres with a potential to reach 100 acres; and the second fire is 1/4 acre and is threatening a structure.
This is a developing story. Continue to check back for updates.