The IDEAM issued a flood alert on the afternoon of August 31 regarding rising river levels in Colombia caused by tropical waves. ^[1] The Colombian Institute of Hydrology, Meteorology and Environmental Studies (IDEAM) reported significant increases in river levels and rising waters in various sectors due to increased rainfall from tropical waves. ^[2] Carolina Rueda, the deputy director of the IDEAM, stated that Tropical Wave No. 43 had already affected the Caribbean coast and caused damage in central and northern Bolívar, most of Sucre, Córdoba, the Urabá Gulf, and the coastal border of Chocó. ^[3] The IDEAM detected significant variations in the San Juan River and its tributaries in Chocó, the León and Atrato rivers in the Caribbean region, and the Pauto and Ariari rivers in the Orinoquía. ^[4] The IDEAM expects Tropical Wave No. 45 to enter later in the week, causing increased rainfall primarily in the Pacific and Caribbean regions. ^[5] IDEAM identified specific rivers with recorded increases and rising waters, including the San Juan, León, Atrato, Pauto, and Ariari, located in different zones of the country. ^[6] Laura Rojas Garzón, a hydrologist at IDEAM's Office of Forecasts and Alerts, stated that the increase in rainfall is related to the entry of different tropical waves and their interaction with the intertropical convergence zone. ^[7]