Newport Beach officials are warning residents about an increased risk of coastal flooding as exceptionally high tides are expected to impact Southern California in the coming days.

A tide gauge near Balboa Island recorded a high tide of 7.6 feet on Saturday, according to city officials. The reading was nearly 2 feet higher than the predicted tide level. City leaders warn that water levels during the anticipated high tides could rise as much as 9 feet above normal, increasing the potential for flooding in waterfront and low-lying areas.

Mayor Lauren Kleiman posted an update on social media urging residents to remain aware of changing conditions as the city prepares for the anticipated high tides.

In response, Newport Beach has expanded coastal protection efforts. Dozens of trucks are being used in a sand replenishment project, while crews continue reinforcing protective sand berms, placing sandbags near vulnerable seawalls and preparing pumps and tide-control infrastructure.

Officials are encouraging residents in waterfront neighborhoods and other low-lying areas to prepare for possible flooding and other weather-related impacts. City leaders also cited concerns about the upcoming El Niño season, which can increase the likelihood of coastal storm activity and elevated surf conditions.

Workers pile sand to help protect homes from flooding as Tropical Storm Rachel approaches in Long Beach, Calif., Saturday, Oct. 10, 2026. (AP Photo/William Liang)

The warning comes after recent flooding on the Balboa Peninsula linked to a Pacific storm, which inundated streets and prompted emergency response efforts. The Long Beach coast was also hit hard and remains highly vulnerable. The high surf left Long Beach homes cracked and crumbling and shredded the boardwalk. City leaders are now racing against time to restore eroded beaches before the next round of powerful waves.

The National Weather Service has issued a coastal flood advisory for Los Angeles, Ventura, Santa Barbara, and San Luis Obispo counties from 5 a.m. Sunday, Oct. 24 to 1 p.m. Thursday, Oct. 29. A coastal flood warning has also been issued for Orange and San Diego counties. The anticipated impacts have also prompted Metrolink to suspend service between the Laguna Niguel/Mission Viejo and Oceanside stations beginning Monday.

Residents are being advised to stay off newly constructed sand berms, avoid active work areas and expect limited beach access while mitigation efforts continue.