Advances in a field of research known as reticular chemistry could provide a breakthrough solution to the growing water scarcity crisis in the western United States. Material science researchers have developed highly porous crystalline materials, known as metal-organic frameworks (MOFs) and covalent organic frameworks (COFs), capable of efficiently capturing water vapor from the atmosphere—even in extremely dry conditions. These novel materials could transform the way water is sourced, offering an alternative to reliance on dwindling natural reservoirs.