(Update, 7:43 p.m.) - Fire officials say forward progress has been stopped.
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(Original) - Firefighters were at the scene of a grass fire Tuesday evening along the Cuesta Grade just north of San Luis Obispo.
The fire was reported shortly after 6 p.m. on a hillside off northbound Highway 101 near Reservoir Canyon Road.
The fire was burning beneath power lines. PG&E reported a small outage in the area at 6:25 p.m.
Several engines, a dozer and aircraft were responding to the fire.
Traffic along Highway 101 did not appear to be affected.
