Tuesday, September 15th, 2026 — Southern California property owners and insurers are facing increased coastal loss exposure after large swells and high tides damaged homes and infrastructure over Labor Day weekend, while scientists warn that El Niño conditions could produce more serious flooding later this year.
Swells generated by Hurricane Marie combined with unusually high tides along the coast from Long Beach to San Diego. Sections of the Long Beach Peninsula boardwalk were destroyed, at least two dozen homes were placed under evacuation orders, and a collapsed driveway at an oceanfront Malibu property produced a sinkhole that prompted evacuations at 31 nearby homes. Dana Point officials red-tagged seven storm-damaged homes and yellow-tagged two others.
The losses raise significant coverage questions. Standard homeowners policies generally exclude flooding, storm surge and wind-driven wave damage. The California FAIR Plan also does not cover those perils unless separate difference-in-conditions coverage has been purchased. Policyholders generally need National Flood Insurance Program coverage or private flood insurance for flood losses.
California’s flood insurance penetration remains low despite its coastal and inland flood exposure. A Neptune Flood analysis found that only 1.4% of California homes have flood insurance of any kind. California represents about 12% of the U.S. population but approximately 4% of NFIP policies, according to AM Best. Even insured homeowners can face substantial uncovered losses because the NFIP residential building limit is $250,000, well below the value of many California homes.
Claims adjusters handling coastal losses may need to pay particular attention to causation and policy language where several damage mechanisms occur during the same event. Wave action, inundation, erosion, structural failure and other physical damage can produce disputes over whether a loss falls within covered or excluded causes. The source material does not establish how insurers have handled claims from the Labor Day damage, so the extent of resulting coverage disputes or insured losses is not yet known.
Another potential source of coastal losses is approaching from the south. A coastally trapped Kelvin wave associated with El Niño is moving north along Mexico’s Pacific coast and is expected to reach Southern California in early October. North Carolina State University oceanographer Dillon Amaya said it could raise coastal sea levels by 6 to 12 inches for months. That increase would come on top of existing sea-level rise and an ongoing marine heat wave.
Federal forecasters put the probability of El Niño becoming very strong during the final three months of 2026 at 98%, with a 75% chance that it becomes stronger than any event since records began in 1950. University of California climate scientist Daniel Swain warned that coastal flooding is expected to worsen during the fall and especially during winter.
The potential losses arrive while California’s property insurance market is already under pressure from wildfire exposure and reduced admitted-market capacity. More homeowners have moved to the FAIR Plan and surplus lines coverage, with the surplus lines market exceeding 300,000 homeowners policies in 2025. Those market changes can leave adjusters working with increasingly varied policy forms, limits and coverage structures after catastrophe losses.
Flood claims also face a federal uncertainty. NFIP authorization is scheduled to expire Sept. 30, 2026, unless Congress acts. The approaching deadline could affect the program’s ability to issue new policies if authorization lapses, adding another concern as California enters a period of heightened coastal flood exposure.
Local governments are preparing for additional high-water events. Long Beach officials are reinforcing sand berms and seawalls and inspecting storm drains, while Orange County is rehabilitating pump stations and communities are stockpiling sandbags. For claims organizations, the coming months could test both coastal catastrophe response capacity and the practical consequences of California’s unusually low flood insurance participation.
