Póster presentado en el XII CONGREMET del 26 al 29 de mayo de 2015 en la ciudad de Mar del Plata, Argentina.The severe drought in eastern Argentina from late 2007 to early 2009 had important economic impacts. This event was characterized by the unusual combination of high severity, large spatial extent and extended duration of dry conditions. Four indices were compared for the study of dry and wet periods, giving similar behavior. The analysis of this drought were performed with the Standardized Precipitation Index (SPI). The impact on climate-sensitive sectors were analized through maize yields.