A brush fire near the Rossmoor Golf Course sent plumes of smoke sailing into the sky and closed roads Saturday.

The Contra Costa Fire District received reports of smoke from residents Saturday afternoon, said Battalion Chief Dave George. The fire apparently started when a transformer blew up and a power line fell down, cutting off power to thousands and showering the dry grass near Stanley Dollar Drive with sparks.

District crews responded to the 2-acre fire on the ground. Cal Fire and the East Bay Regional Park District also lent a hand by dumping water via helicopter.

Firefighters got the blaze under control within an hour, George said. "What we were very thankful for is we received many calls from Rossmoor residents. We were able to get on the fire and get ahead of the fire."

No one was injured and no structures were damaged. Police closed Stanley Dollar and Running Springs Road as crews mopped up the scene over the next few hours.

Meanwhile, 2,860 residents lost power during the simultaneous outage at 2:23 p.m., said J.D. Guidi, PG&E spokesman. The company had restored power to the majority of customers by 7 p.m.