Southern California could experience an extreme rainy season, potentially leading to flooding, mudslides, and infrastructure damage. Past strong El Niño events have caused significant disruptions, including record rainfall and debris flows that damaged homes and buildings. While the likelihood of heavy precipitation is high, the Climate Prediction Center cautions that even very strong El Niño events do not always produce expected outcomes in all regions. Residents should prepare for possible severe weather impacts, including localized flooding and landslides, especially in areas prone to such hazards.