El Niño triggers heavy rain and flooding risks in Argentina and Uruguay

The El Niño phenomenon is driving significant weather instability across South America, particularly in Argentina and Uruguay. Meteorologists warn of an intensification of the phenomenon, which could lead to record temperatures in the spring of 2026 and increased frequency of severe storms.

In Argentina, several regions are under alert. The Litoral and Mesopotamia regions, including provinces like Entre Ríos, Corrientes, and Misiones, face high risks of torrential rains and river flooding. In Buenos Aires and the AMBA region, cyclogenesis is expected to bring stronger winds, lower temperatures, and heavy rainfall. Mendoza is also anticipating a period of instability with potential snow in mountainous areas and significant temperature drops.

In Uruguay, MetSul warns of extreme rainfall, with accumulations between 100 and 300 millimeters expected in several departments. This could trigger flash floods and rising river levels. While the Paraná River currently remains within normal levels, experts from the Instituto Nacional del Agua are monitoring the situation closely to see if increased rainfall in the upper basin will trigger a significant rise.