What is the location of the flooding?
Since October 8, 2026, torrential rain has triggered flash flooding and mudslides in Santiago and surrounding areas of central Chile. The Mapocho River overflowed following heavy downpours. Santiago recorded 74 millimeters of rainfall during the first seven days of October, its wettest start to October in 76 years. The flooding coincides with a strengthening El Niño phenomenon, expected to peak in December and potentially rank among the most intense since 1950 (1).
Which cities or areas are affected by the flooding?
Severe flooding has affected Santiago and surrounding areas, including Las Condes, which received 14.4 centimeters of rain in recent days, about nine times its average October rainfall. The overflowing Mapocho River inundated parts of Talagante, 35 kilometers southwest of Santiago, trapping residents. Floodwaters swept vehicles away and inundated homes (2).
What is the current containment status of the flooding?
Flood response operations continue amid severe weather. Firefighters rescued or evacuated more than 1,000 people. Dozens of homes were damaged, and nearly 12,000 customers lost power. The San Carlos Canal overflow triggered flash flooding in Las Condes (3).
Are there any evacuation orders or alerts in place?
SENAPRED issued red alerts for 10 districts in the Santiago Metropolitan Region. President José Antonio Kast declared a state of emergency in Las Condes, expanding government agencies' response powers. Schools were ordered closed on Friday in affected areas. Authorities urged residents to avoid flood-affected areas, limit unnecessary travel, and monitor local updates (4).
How can I protect myself from mold after flooding?
It’s important to take steps to prevent mold after a flood.
- Before entering a flooded area, make sure it is safe and free from electrical hazards or structural damage.
- Use protective gear: wear gloves, goggles, and a KN95/FFP2 mask to minimize exposure to mold spores.
- If there is still standing water, remove it as quickly as possible. Use pumps, wet-dry vacuums, or buckets to extract the water.
- Open windows and doors to facilitate air circulation and use fans, dehumidifiers, and HVAC systems to help dry the space. This step is crucial within the first 24-48 hours after flooding to prevent mold growth.
- Remove and discard any items that have been severely damaged by floodwater and cannot be thoroughly cleaned and dried. This includes carpets, upholstered furniture, mattresses, and any other porous materials.
- Thoroughly clean all hard surfaces with a detergent or cleaner suitable for mold remediation. Use a solution of 1.5 cups of bleach mixed with one gallon of water to disinfect nonporous surfaces. Never mix bleach with ammonia or other cleaning products, as the fumes are toxic.
- Maintain an indoor relative humidity (RH) of 35-50%. High humidity promotes mold growth, so consider using dehumidifiers in damp areas.
- Run a high-performance air purifier for mold, both during and after the mold removal work.
- If the flooding and mold damage are extensive, consider contacting professionals specializing in mold remediation to ensure proper cleanup and restoration.
Remember, mold can pose health risks, so it's important to take these steps promptly and thoroughly. If you experience persistent mold-related health issues or have concerns about extensive mold growth, consult with a medical professional or a mold remediation specialist.
