The earthquake is the largest to shake the Bay Area since the 6.9-magnitude Loma Prieta quake in 1989.
Napa City Manager Mike Parness released the damage details at an afternoon news conference. Officials say they are still assessing buildings in the area. Parness says the buildings to which only limited access is being granted mostly suffered broken windows.
The magnitude-6.0 earthquake that struck at 3:20 a.m. Sunday about 6 miles from the city of Napa ruptured water mains and gas lines, left two adults and a child critically injured, upended bottles and casks at some of Napa Valley's famed wineries and sent residents running out of their homes.