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
Breaking: Today at 5:30 Pm, Alameda County Firefighters are on scene for a working fire at the Old San Lorenzo theatre in San Lorenzo. Crews are actively fighting the fire. Please avoid the area. The media area will be at the corner of Paseo Grande and Hesperian Blvd. pic.twitter.com/J737jF6NXw— Alameda County Fire (@AlamedaCoFire) June 6, 2020
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.
The theater was designated as a California Historic Resource in 2001, according to Cinema Treasures.