GREENVILLE, Calif.—The main thoroughfare in a historic California gold-rush town was in smoldering ruins on Thursday, hours after the state’s largest wildfire engulfed the hamlet of Greenville in the Sierra Nevada Mountains. Fire crews were still working on Thursday to extinguish fires in Greenville, about 160 miles north of Sacramento, after the Dixie Fire roared through on the previous night. As apocalyptic images from the burnt-out center of town spread, showing Greenville’s quaint main strip in heaps of ashes and debris as smoke rose into the hazy sky, people from the area grew emotional. “We lost Greenville tonight. And there’s just no words for how us in government haven’t been able to get the job done,” Rep. Doug LaMalfa (R-Calif.), who represents the area, said in a video posted on Facebook, pausing to gather himself. “My heart is just aching for what people are dealing with up there right now,” …