While heavy rains knock out an Enel hydroelectric plant.
Marcelo Mena takes over from Pablo Badenier as Chile's environment minister.
Construction of the El Encino-La Laguna pipeline is underway but has faced opposition in the town of Lerdo.
Argentina and Paraguay seek to resolve dam debt dispute; power outages down in Buenos Aires; Pampa sees earnings slide.
Delegates to gather in Mexico City next month to assess progress made in the region.