As heat waves spread across the country, it’s more important than ever to stay hydrated. There are a plethora of drinks from around the world that are designed to quench your thirst: sweet tea, sorrel, sambaram, schorle and switchel, to name a few. My favorite of them all, though, is agua fresca. The drink, translating to “fresh water,” is alleged to have originated in precolonial Mexico and is now a staple in the region.