Farmers in California, where Gov. Jerry Brown last month, are facing hard choices as a drought threatens to ruin their crops. They must weigh the costs of paying for irrigation against the chance that their fields will never get enough water this season. A striking picture illustrates the severity of the situation, as Northern California's Folsom Lake, a reservoir northeast of Sacramento, is seen in January at only 17 percent of its capacity. In July 2011, "the lake was at 97 percent of total capacity and 130 percent of its historical average for that date," according to NASA.