Rosario. With few interruptions, the rain continued for about a week. Rosario is traversed by the Ludueña Stream in the north; its southern border is partly defined by the Saladillo Stream. The Ludueña has historically been prone to overflowing, which has prompted the construction of works (canals and piping) to contain and derive its waters. Soon after the beginning of the rain, the Ibarlucea Canal (which empties into the main course of the Ludueña, overflowed and flooded several neighbourhoods in the northwest of Rosario. At the peak of the crisis, on 31 March, about 4,000 people were evacuated in several emergency centers throughout the city. As the strong rain started to subside in Rosario, the storms were moving north towards the area of Santa Fe, the provincial capital. Santa Fe is built on low-lying terrain at the junction of the Salado and Paraná rivers, and is still recovering from a flood caused by the Salado in 2003. This time, however, both rivers were rising. At some point, the physical barriers that had been set in place against the rise of the Paraná River prevented the natural drainage of the flood waters brought by the Salado. The existing pumps were not enough, and there was a delay bringing extra ones. As the neighbouring areas were flooded and the incoming roads submerged or damaged, Santa Fe became practically isolated with the exception of the Hernandarias Subfluvial Tunnel. About 20,000 people were displaced or evacuated. The provincial government decreed a state of hydrical emergency on 29 March. Evacuees were sent to military and private facilities (such as sports clubs and schools), where they were given food and shelter, and the risk population (mainly children) was vaccinated. After the end of the emergency, as the first estimates of the damages were released, the provincial government set aside funds (620 million Argentine pesos, about 200 million USD) to assist the affected towns and cities; of these, AR$30 million were assigned to each of Santa Fe City and Rosario. References Climate of Argentina 2007 Argentina Floods