According to the Napa County Office of Emergency Services, evacuations are underway on the south side of SR-128 at the 6500 to 7000 block of Wragg Canyon.
The CHP says SR-128 is closed from Markley Cove to Wragg Canyon Road.
Drivers are urged to take alternate routes.
Firefighters say they were able to establish structure protection and saved nine houses from burning.
No damage or injuries have been reported.
Stay with ABC7 News for the latest details on this developing story.
Traffic Alert!!— CHP Napa Area (@CHP_Napa) July 22, 2019
Vegetation fire near #lakeberryessa. SR-128 will be closed from Markley Cove to Wragg Canyon RD. Use alternate routes. @NapaRegister @SolanoSheriff @ChpSolano @CalFireNews @CaltransD4 @993thevine