One of nearly two dozen fires burning across Northern California on Wednesday scorched homes in a Gold Rush town settled in the 1850s by thousands of Chinese miners who had faced discrimination and were driven out of a nearby camp. The quick-moving fire in the Sierra Nevada foothills threatened the few remaining historic structures in Chinese Camp, forced the evacuation of its roughly 100 residents and closed a highway that’s a main route between San Francisco and Yosemite National Park. It’s not clear yet whether the town’s handful of Gold Rush era structures -- including an old post office built in 1854 -- were damaged in the fire that erupted Tuesday and continued burning without any containment. A shuttered Catholic church dating back to 1855 appeared to have survived the flames. The town’s general store where tourists could pickup supplies and see historic artifacts also seemed to be intact. But on some lots, all that remained were charred brick walls and scorched trees.