Four homes have been destroyed by a wildfire sweeping through central Oregon, where thousands of residents remained under evacuation orders. Meanwhile, a blaze in Northern California wine country has so far spared some of the state's most famous vineyards. On Monday, the Flat Fire was threatening hundreds of houses in Oregon's Deschutes and Jefferson counties. A heat advisory was in place through Wednesday, and forecasters warned that potential thunderstorms could create erratic winds that would challenge firefighters. The Pickett Fire in Northern California has charred about 10 square miles of Napa County, with just 13% containment, but area wineries have reported no damage.