Torrential rains cause catastrophic flooding in Santiago, Chile prompting mass evacuations

Torrential rains fueled by a powerful El Niño climate pattern have caused catastrophic flash flooding and mudslides in Santiago, Chile, prompting President José Antonio Kast to declare a state of catastrophe in the hard-hit suburb of Las Condes. The historic storm, which brought Santiago its rainiest October in 76 years, caused the Mapocho River to overflow, injuring at least six people, damaging medical clinics, and forcing emergency crews to rescue over 1,000 trapped residents.

Flooding impact in Las Condes

• ▪Mauricio Lorca, the national director of Chile's Geology and Mining Service, characterized the Las Condes flooding as a rapid 'flash flow' phenomenon that drags large amounts of sediment.
• ▪The Mapocho River overflowed its banks, flooding two private clinics and a university health clinic in the Las Condes suburb.
• ▪Flash flooding and mudslides inundated the wealthy suburb of Las Condes, located in the eastern outskirts of Santiago, Chile, on October 8, 2026.

Record-breaking October rainfall

• ▪Santiago recorded 74mm of rain in the first seven days of October 2026, making it the rainiest October for the area in 76 years.
• ▪Las Condes mayor Catalina San Martín stated that the district received 14.4 centimeters of rain, which is about nine times the average October rainfall.

Casualties and investigations

• ▪Chilean officials investigated the death of one person found in a flooded underpass in San Bernardo, south of Santiago, on October 8, 2026.
• ▪The October 2026 flash flooding in the Santiago region injured at least six people, including a 1-year-old child who suffered broken bones.

Rescue and evacuation operations

• ▪Chile's disaster-response agency Senapred issued a red alert for 10 districts around Santiago, urging immediate evacuations due to threat of further mudslides.
• ▪Chilean firefighters and emergency crews rescued or evacuated more than 1,000 people trapped in vehicles and buildings during the October 2026 flooding.
• ▪Police in central Chile used helicopters to airlift several trapped residents and pets to safety along the Mapocho river in Talagante on October 8, 2026.

Official emergency responses

• ▪President José Antonio Kast declared a state of catastrophe and emergency for the Las Condes district to deploy military equipment and additional rescue teams.
• ▪Santiago metropolitan authorities suspended all school classes and urged residents to limit personal travel in affected areas on October 8, 2026.

Influence of the El Niño phenomenon

• ▪Meteorologists and climate experts attributed the torrential rains in central Chile to a powerful, strengthening El Niño climate phenomenon.
• ▪The World Meteorological Organization stated on October 8, 2026, that the current El Niño was expected to peak in December and could be among the most intense since 1950.

Debatable claims

• ▪Santiago's infrastructure is inadequate to withstand intensifying El Niño weather events
• ▪Declaring a state of catastrophe in Las Condes was a justified use of emergency powers
• ▪Chilean authorities should have pre-emptively evacuated riverside communities before the storm