UPDATE (11:30 a.m.) - Caltrans QuickMap shows no traffic along southbound Highway 101 as of 11:30 a.m.
According to the San Luis Obispo County Fire Department, most resources have been cleared from the scene.
There is no word on the cause of the fires.
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UPDATE (10:45 a.m.) - The vegetation fires are causing heavy traffic along southbound Highway 101 near Santa Margarita, according to Caltrans.
At 10 a.m., the California Highway Patrol (CHP) reported that crews were battling two fires in the area. One was burning just north of State Route 58, and the other was burning just south of State Route 58.
Authorities requested that Caltrans shut down the State Route 58 on-ramp to southbound Highway 101 a few minutes later.
By 10:23, CHP reported that the fire just south of State Route 58 was "clear," and that Caltrans could reopen the on-ramp.
The agency said at 10:30 a.m. that the fire just north of State Route 58 was also extinguished.
Caltrans QuickMap shows heavy traffic along southbound Highway 101, extending about 2.5 miles north of the State Route 58 intersection.
As of 10:45 a.m., there are no lane closures in the area.
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ORIGINAL (9:55 a.m.) - Firefighters are responding to a vegetation fire just west of Santa Margarita Wednesday morning, according to the CHP.
The fire reportedly broke out around 9:40 a.m. near the intersection of State Route 58 and Highway 101.
The San Luis Obispo County Fire Department reports that fire engines, water tenders, and air attack are headed to the scene.
This story will be updated as more information becomes available.