The primary risks include flooding in both designated flood zones and other vulnerable areas across San Diego. With El Niño conditions expected to exacerbate rainfall and high tides, residents in low-lying and coastal areas are particularly at risk. Flooding can lead to property damage, road closures, and potential safety hazards. The Chollas Creek watershed, previously impacted by severe flooding in 2024, remains a concern. City officials emphasize that preparedness is crucial to minimizing risks and ensuring community safety.