Pacific Coast Highway in Malibu faces fresh concern as damage risks grow

Coastal erosion threatens the famous highway

Pacific Coast Highway has survived fires, floods, landslides, and years of pounding surf. Now, Malibu officials say coastal erosion is rapidly threatening parts of the famous road inside the Palisades Fire burn area, where protective structures were lost.

Caltrans has completed numerous recovery repairs and continues work along the corridor, but Malibu is pushing for stronger permanent stabilization at the most vulnerable coastal locations.

Fire damage left parts more exposed

Along parts of Malibu, beachfront homes and seawalls had helped buffer PCH from direct wave action. The Palisades Fire destroyed many beachfront structures, leaving some sections more exposed.

Malibu says erosion can remove material supporting the roadway embankment. That raises concerns not only for drivers but also for utilities and private properties packed tightly between the highway and the ocean.

23 beachfront parcels are red tagged

Pacific Coast Highway is now being watched parcel by parcel. After inspections of 320 beachfront properties, Malibu said seven more were labeled unsafe in August, raising the total number of red-tagged parcels in the affected area to 23.

Caltrans and SoCalGas crews continue monitoring conditions. Malibu and Caltrans are also meeting regularly as officials consider different temporary protections for individual problem spots.

Big Rock becomes a trouble spot

Big Rock is one of the areas drawing special attention. Malibu has documented serious erosion affecting beachfront properties, while Caltrans has multiple recovery projects in and around Big Rock involving drainage, slope protection, barriers, and debris control.

Separately, Malibu reported that Caltrans repaired a failed seawall and filled severe erosion at another critically affected beachfront parcel by August 10.

Fun fact: Caltrans’ northern PCH fire-recovery project covers about 4.5 miles around Malibu.

High tides can speed up erosion

Erosion can happen gradually, then accelerate when high tides and strong surf arrive together. Malibu warned that water repeatedly reaching damaged beachfront areas could strip away more material that supports the Pacific Coast Highway.

Malibu said extreme high tides were expected to exceed eight feet for three days during the week of its August 11 update, prompting continued monitoring by the city, Caltrans, and utility crews.

Fun fact: NOAA says roughly 85% of California’s coastline experiences active erosion from natural and human-related causes.

El Niño raises the winter stakes

Malibu’s concern is growing as El Niño strengthens ahead of winter. NOAA said on August 13 that there is a greater than 90% chance of a very strong El Niño during fall and winter 2026 to 2027.

A strong El Niño does not guarantee damaging storms in Malibu. Still, it increases concern about conditions that can bring heavy rain, high surf, and powerful wave events to an already vulnerable coastline.

Caltrans is already rebuilding defenses

Caltrans has reconstructed fire-damaged slopes, replaced signs, cleaned and repaired drainage systems, and completed or continued guardrail and other infrastructure work along PCH since the 2025 Palisades Fire.

A separate seawall repair is also underway near Las Flores Canyon Road. Caltrans says the work includes removing damaged concrete, strengthening reinforcing steel, and applying protective material to the state-owned structure.

Sea level rise adds long-term pressure

Today’s erosion problem also sits inside a longer coastal challenge. Malibu’s own planning documents identify sea level rise, tidal flooding, storm damage, and erosion as risks to homes, roads, beaches, and other coastal resources.

Those risks make long-term protection of the Pacific Coast Highway a broader challenge than simply repairing damage from the Palisades Fire.

Beaches help shield the roadway

A beach is more than a place for swimming and sunsets. Sand can absorb wave energy before it reaches roads, homes, and seawalls, which means shrinking beaches can leave coastal infrastructure more exposed.

Southern California has already experienced significant shoreline loss in vulnerable areas. For Malibu, protecting Pacific Coast Highway may eventually require combining engineered defenses with broader efforts to manage beaches and shoreline change.

PCH has already endured months of disruption

The Palisades Fire did more than damage nearby homes. Pacific Coast Highway was closed for months while crews cleared debris, inspected unstable areas, repaired infrastructure, and responded to winter flooding and debris flows.

PCH reopened to all drivers through the Palisades Fire area on May 23, 2025, but it remained an active work zone as recovery and utility projects continued.

Safety was already a concern on PCH

Erosion is not the highway’s only challenge. Before the Palisades Fire shifted attention toward emergency repairs, Caltrans was already studying ways to make Pacific Coast Highway safer for drivers, cyclists, and pedestrians in Malibu.

Future improvements involve much more than rebuilding damaged edges. Officials are balancing roadway safety, coastal resilience, traffic flow, beach access, and long-term maintenance on one narrow coastal corridor.

Big Sur shows what prolonged damage can do

California already has a warning about what happens when Highway 1 becomes unstable. Farther north in Big Sur, landslides and repeated storm damage have led to prolonged closures, costly repairs, and major problems for tourism-dependent businesses.

Malibu’s geography is different, but the lesson is familiar. When a coastal highway loses ground beneath or beside it, repairs can become complicated, expensive, and difficult to finish quickly.

For another Malibu coast update tied to dramatic rock formations, scenic beaches, and shoreline beauty, see why El Matador is one of the area’s standout spots.

Winter could test Malibu’s progress

Malibu is urging Caltrans and other agencies to strengthen vulnerable sections before the winter storm season, while temporary repairs, monitoring, barriers, and seawall work continue.

The bigger challenge will not disappear after one season. Fire recovery, coastal erosion, rising seas, and extreme surf are forcing California to rethink how it protects one of its most famous roads.

For another Malibu coast update tied to sea caves, tide pools, and canyon trails, see why this overlooked park is worth slowing down for.

Would worsening road damage make you think twice before taking a classic Malibu coastal drive? Share your thoughts and drop a comment.

This slideshow was made with AI assistance and human editing.

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