UPDATE (2:09 p.m.) - CAL FIRE reports that forward progress of the fire has been stopped at one acre.
(1:44 p.m.) - One structure was threatened by a vegetation fire that broke out Tuesday afternoon along Highway 41 in the Atascadero area, fire officials say.
At around 1:30 p.m., CAL FIRE SLO said the fire on Highway 41 West across from Toro Creek Road was one acre in size but had the potential to burn 20 acres.
Crews were on scene.
No other information was immediately available.