A strong El Niño could lead to above-average rainfall in Southern California, raising the risk of flooding, mudslides, and coastal erosion. Marine ecosystems may also suffer due to prolonged warm ocean temperatures, which can disrupt food chains and harm marine life. However, the increased rainfall could provide much-needed relief to drought-stricken areas. Forecasters caution that El Niño's impacts are not guaranteed and may vary depending on other atmospheric conditions.