Colombia’s Institute of Meteorology and Environmental Studies (Ideam) is forecasting heavy rainfall across ten departments in October, despite the ongoing El Niño phenomenon. This prediction indicates a 50% probability of above-normal precipitation due to the convergence of atmospheric systems. The forecast challenges expectations that El Niño would bring drier conditions nationwide. While El Niño typically causes decreased rainfall in Colombia, the interaction of other weather patterns is expected to counteract this effect in specific regions. The ten departments expected to experience above-normal rainfall were not specified in the provided text. Authorities are likely monitoring the situation closely to prepare for potential impacts such as flooding and landslides.