Undated image shows a cranium of an animal in the dry flow of Cauca River on its way by Navarro town, in Valle del Cauca department, Colombia. Although rains have been registered this week and partly relieve the drought in some rivers of the country, the basins of the rivers Magdalena and Cauca remain the most affected by the season of El Nino, according to information from the Institute of Meteorology, Hydrology and Environmental Studies (IDEAM, for its acronym in Spanish) of Colombia. (Xinhua/Jorge Orozco/COLPRENSA)