The National Meteorological Service, which issued a red alert for the region on Friday evening, reported rainfall between 150 and 250mm (6-10 inches) between the cities of Zarate and Arrecifes. It warned that storms were "constantly regenerating," with more rain expected. In San Antonio de Areco, more than 260mm fell in 24 hours – an amount local mayor Francisco Ratto called "rarely surpassed."