The Mexican state of Sonora is proud of its cattle ranching culture. It’s famous for its carne asada. Its state flag is emblazoned with a bull. A decade ago, 80% of Sonoran land was used for livestock like cattle. Today, Sonora is in a drought and facing a hotter, drier future. Cows are going hungry — tens of thousands are starving to death. Farmers are selling herds, and a way of life that stretches back generations is fading.