In pictures: Northern California firesPublished10 October 2017Shareclose panelShare pageCopy linkAbout sharingImage source, Getty ImagesImage caption, The state's fire service has been battling 15 separate fires across nine counties including Napa, Sonoma and Yuba.Image source, Getty ImagesImage caption, Some people have tried to save their homes from the flames, which have engulfed some 49,000 acres (28,000 hectares) so far.Image source, AFPImage caption, Napa, Sonoma and Yuba make up California's famed wine region, lying to the north of San Francisco.Image source, AFPImage caption, At least 1,500 buildings and other property have been destroyed.Image source, ReutersImage caption, Aircraft have been used to drop fire retardantImage source, Getty ImagesImage caption, The California governor has declared an emergency. saying the wildfires "continue to threaten thousands of homes, necessitating the evacuation of thousands of residents".Image source, Getty ImagesImage caption, This is one of the worst fires in the state's history.Image source, Getty ImagesImage caption, It has been stoked by a combination of strong winds, low humidity and hot, dry weather.Image source, Getty ImagesImage caption, It is not yet known how the fires started.More on this storyCalifornia wine country wildfires kill 13Published10 October 2017