( CNN ) -- In the heart of Northern California 's wine country , piles of stemware lay shattered on the ground . Building facades in historic downtown Napa crumbled into the streets . And residents who enjoyed decades of calm received a harsh reminder that intense quakes can strike anytime . `` I was in shock to see people 's homes and offices on the floor , '' Napa resident Elise Martinez said . `` This is life-changing . '' But even as the Bay Area tries to clean up from its strongest earthquake in 25 years , the tremor could have been much worse . No one was killed in the 6.0-magnitude earthquake that jostled residents awake early Sunday . The Queen of the Valley Medical Center said it has treated `` approximately 208 '' patients since the earthquake struck . Of those , 17 were admitted to the hospital , and one is still in critical condition . The majority of patients sustained injuries that were not life-threatening . But the hospital has not seen any patients related to the earthquake since 11 p.m. PT Sunday . Although 70,000 customers lost power after the quake , power was restored for all customers Monday afternoon , according Pacific Gas and Electric . 'We need more help ' Still , the recovery will be daunting . `` Everything and everyone in Napa was affected by the quake , '' said CNN iReporter Malissa Koven . `` My house , along with everybody else 's , is a disaster . It looks like somebody broke in and ravaged the place , room by room . '' Napa City Manager Mike Parness said the damage is beyond what the city can handle . `` We have exhausted our local resources , '' he said . `` We need more help from the outside . '' California Gov . Jerry Brown declared a state of emergency . The earthquake triggered six major fires that destroyed several mobile homes , Napa Division Fire Chief John Callanan said . Safety measures are still in effect for dozens of buildings across the city . Upwards of 200 commercial and noncommercial structures have been marked by yellow tags , meaning `` property owners can go into the building to clean up but have been advised not to occupy until further notice , '' said Rick Tooker , Napa community development director at a news conference Monday evening . `` Seventy commercial and noncommercial structures have been red-tagged and can not be occupied , '' added Tooker . And it could take up to a week to get the water system back to normal after dozens of reported water-main breaks , Napa Public Works Director Jack Rochelle said . But he said running water is safe to drink . More aftershocks expected . About 50 to 60 aftershocks rattled the area in the hours after the quake , said John Parrish , chief of the California Geological Survey . The strongest had a magnitude of 3.6 . `` We do think the aftershocks will continue for several weeks , '' Parrish said . The quake was the strongest to hit the Bay Area since 1989 , when a 6.9-magnitude temblor struck during the World Series . The Loma Prieta earthquake caused 63 deaths , 3,757 injuries and an estimated $ 6 billion in property damage , according to the U.S. Geological Survey . The damage from Sunday 's earthquake was relatively minor compared with the buckled highways and destroyed homes 25 years ago . But some said Sunday 's quake seemed more intense . `` Honestly , it felt much worse than the '89 earthquake , '' CNN iReporter Garret Gauer said . `` The refrigerator relocated itself to the other side of the kitchen . '' One child hurt when a fireplace collapsed was airlifted to UC Davis Medical Center , hospital spokeswoman Vanessa deGier said . Nearly 160 people were treated for minor injuries at the emergency room at Queen of the Valley Hospital , though hospital CEO Walt Mickens could not confirm that all of those patients were injured in the earthquake . How did it feel ? Sunday 's earthquake was centered 6 miles southwest of Napa and 9 miles southeast of Sonoma , according to the USGS . The U.S. Geological Survey estimated based on their locations that 15,000 people experienced severe shaking , and 106,000 people felt very strong shaking . The quake struck about 7 miles deep and was considered `` strong '' by the Geological Survey . Major quakes start at a 7.0 magnitude , according to the agency 's scale . The economic loss will probably top $ 1 billion , according to USGS data . At Silver Oak Winery , owner David Duncan tried to clean up hundreds of broken wine bottles that tumbled off the shelves . `` Those bottles were very unique , '' he said . They were part of his private collection and worth hundreds of dollars . California Lt. Gov . Gavin Newsom stressed that it 's not just the wine country that needs help . `` There 's a mythology about Napa , that it 's all fancy wineries , '' Newsom said . `` But underneath that there are a lot of folks here -- very low income -- that are going to need support . '' Follow the story in a CNN Storify . Did you feel it ? Weigh in at Facebook , Twitter or CNN iReport . CNN 's Dan Simon , Susanna Capelouto , Josh Levs , Melanie Whitley , Dave Alsup , Scott Thompson and Carma Hassan contributed to this story .
`` Approximately 208 '' patients have been treated since the earthquake struck . `` We have exhausted our local resources , '' Napa 's city manager says . The U.S. Geological Survey said a magnitude 6.9 quake hit at 12:45 a.m. Thursday in northern California. Jerry Brown declares a state of emergency .