A brush fire that grew to about an acre caused officials to issue a Sig Alert on State Route 52 in Tierrasanta Thursday afternoon.
Smoke was first reported along the westbound SR-52 east of Santo Road at 4:45 p.m. A Sig Alert was issued for both sides of the freeway.
The fire burned in two spots, which totaled about an acre, according to San Diego Fire officials.
The flames were moving among light fuel and light winds before firefighters doused them using a helicopter and ground crews. No structures were threatened.
