According to the National Meteorological Service, since 23 November 2009, the provinces of Chaco, Entre Rios, Corrientes, Santa Fe and Misiones have been affected by heavy rain and floods. The communities at risk are those in low level areas due to their proximity to the overflowed Parana river, Uruguay river and the Salado del Sur basin.
Source: http://www.glidenumber.net/glide/public/search/details.jsp?glide=18975.