100 to 150 homes affected by flash flooding in Mason Valley, according to Lyon County Manager Jeff Page. Emergency crews are working to identify if anyone needs help, but the flash flooding has left anywhere from 18 inches to two feet of water in places. According to Page, the area experiences flash flooding about every 2-3 years, but this is the worst seen in some time. The water came from a thunderstorm that hit the Mt. Grant and Bald Mountain ranges.