Intense rainfall in the upper and middle basins of the Rímac, Chillón, and Lurín rivers near Lima, Peru, has exceeded normal levels for the month, according to reports from the National Service of Meteorology and Hydrology of Peru (Senamhi). On February 14th, the Santiago de Tuna station in the upper Lurín river basin recorded 74.2 mm of rainfall in a single day, categorized as an “extremely rainy” event.
The same day, most stations in the upper Rímac river basin also registered “extremely rainy” conditions. Senamhi’s monitoring indicates these conditions align with the latest quarterly climate forecast, and above-normal rainfall is expected to continue in these areas through the end of February.
Senamhi has reinforced monitoring of the Rímac River at the Chosica hydrometeorological station, located in the Lurigancho district, to strengthen preventative measures against heavy rains, landslides, and flooding. A technical visit to the Automatic Hydrometeorological Station (EHMA) HLG Chosica was conducted on February 7, 2026, to assess the functionality of meteorological and hydrological monitoring systems within the Rímac basin. The agency stated the information gathered will improve access to timely information for disaster prevention.
As of February 24, 2026, the Rímac and Chillón rivers have reached a yellow alert level, activating vigilance measures. The Facebook page for Senamhi and the Ministry of Environment (Minam) reported that the increased river flows are a result of the recent heavy rains. The hydrologic monitoring portal Chirilu, maintained by Senamhi, provides data from key stations along the Chillón, Rímac, and Lurín rivers, including Obrajillo, Antapucro, and Chosica.
