Colombia's weather authority, the Ideam, warns that September will bring above-average temperatures, reduced rainfall, and lower river levels as El Niño conditions strengthen in the tropical Pacific. The agency projects maximum temperatures between 31°C and 38°C in parts of the Caribbean, Orinoquía, and Amazonía regions, with Valledupar potentially reaching 38°C, Cúcuta 37°C, and Neiva and Riohacha 36°C .
The combination of heat and dryness raises the threat of vegetation fires, particularly in five Andean departments: Cundinamarca, Tolima, Nariño, Boyacá, and Antioquia . River levels are already declining in the Magdalena-Cauca basin, the Caribbean, and parts of the Pacific, and the trend may extend to the Orinoquía and Amazonía . The Ideam also flags potential deterioration in air quality .
The agency stresses that isolated extreme events—such as strong winds, intense downpours, or cold snaps in high mountains—can still occur, but the overall tendency is drier and hotter . The forecast is tied to the ongoing strengthening of El Niño, as noted in an international update on August 13 .
The Ideam urges citizens, local authorities, and productive sectors to follow official channels in the coming weeks. The conditions are expected to persist at least until the end of September .
