When Sonia Herbert, 78, opened a restaurant in Bombay Beach, a small California neighborhood about 80 miles northeast of San Diego, she welcomed the bustle of tourists and locals visiting the Salton Sea shoreline. Located in Imperial County, the lake and its wetlands offer crucial habitats for migratory birds and a refuge for people from the hot desert sun. But for more than 20 years, she's watched the once-thriving oasis become increasingly desiccated and polluted with agricultural runoff and waste. Rising salinity, exacerbated by a shrinking freshwater supply from the chronically drought-plagued Colorado River, has made the Salton Sea uninhabitable...