Down power lines sparked a small, four-acre brush fire in Jamul, Cal Fire officials said.
The fire broke out off State Route 94 at Rancho Jamul Drive around 3 p.m. Thursday.
A car crash on the freeway sent the power lines falling down, fire officials said.
Crews have since stopped the forward rate of spread.
San Diego Gas and Electric (SDG&E) is on scene as well.
No evacuations have been issued, and no one is injured.
No further details are available.
