The public is being advised to avoid the area.
WATCH: SKY7 video of Alameda County Fire Department crews battling a fire at the historic Lorenzo Theater in San Lorenzo
Crews battle fire at historic Lorenzo Theater in San Lorenzo
[Ads /]
The 73-year-old theater closed in 1982, according to Cinema Treasures, and the nonprofit organization Lorenzo Theater Foundation was formed in 1999 to work for its preservation and restoration.
[Ads /]
The theater was designated as a California Historic Resource in 2001, according to Cinema Treasures.