The map is an update of the previous version, which was published in 2009. In Newport Beach, the tsunami hazard zone was increased slightly in the latest map to help facilitate evacuation responses. Hazard zones include the area between the Balboa Peninsula and Pacific Coast Highway, as well as Newport’s Back Bay.
Meanwhile in Bolsa Chica and Huntington Beach, the tsunami hazard zone shrunk after new data showed that levees and ponds can help protect residents.
Tsunami hazard zones include Pacific Coast Highway, the ecological preserve, several channels and the Santa Ana River up to Adams Avenue, about 3 miles inland.