The anticipated El Niño event poses substantial risks to both coastal and inland areas in Southern California. Coastal regions face almost guaranteed flooding due to elevated sea levels and extreme tides, while inland areas near rivers and creeks are at risk from heavy rainfall. Urbanization has exacerbated flood risks by increasing runoff. Residents in wildfire burn zones may still face mudflow hazards. Historical data shows that severe flooding can lead to billions of dollars in damages and loss of life, as seen in past El Niño events. Experts urge residents to assess their flood risks and prepare accordingly.