SAN FRANCISCO — Fire officials say a downed Pacific Gas and Electric Co. power line ignited a blazed in Marin County that prompted mandatory evacuation.

The Marin County Fire Department said Wednesday the 150-acre blaze at Samuel P. Taylor State Park was 65 percent contained.

The department says many residents are still without power but that it should be restored by Wednesday evening.

The blaze that started Monday quickly spread but cool weather has helped fire crews contain it.

Sparking power lines are one of the leading causes of California's wildfires.

Fire investigators have blamed PG&E equipment for 12 of last year's deadly wildfires in Wine Country.

PG&E is facing dozens of lawsuits from insurers, which have spent billions settling insurance claims from homeowners.