--- title: "California's coastline threatened by powerful storms and massive waves" url: https://newscentral.site/california-s-coastline-threatened-by-powerful-storms-and-massive-waves/ language: en publisher: "News Central Site" section: "Science" published: 2026-10-21T21:00:07.000Z updated: 2026-10-22T06:48:13.074Z id: 962cbf3e-829f-4cae-9ed2-cc327eea1797 source: "Phys.org https://phys.org/news/2026-10-el-nio-threatening-california-fragile.html" attribution: "Link to https://newscentral.site/california-s-coastline-threatened-by-powerful-storms-and-massive-waves/ and name News Central Site when you quote or summarize this story." --- # California's coastline threatened by powerful storms and massive waves Heavy rain and high sea levels are causing widespread destruction along California's coast. California's coastline is facing a threat from El Niño once again, as powerful storms bring heavy rain and massive waves that can cause widespread destruction. The state experienced this phenomenon in 1982-83, when one of the most destructive El Niño winters on record battered the coastline with torrential rain and huge waves. The combination of high sea levels, astronomical tides, and multiple storms created a perfect storm that left a trail of devastation in its wake. In Southern California, the impact was particularly severe, as powerful waves destroyed sections of several piers, including the iconic Santa Monica Pier, which lost one-third of its structure. Other piers, such as those at Huntington Beach, Paradise Cove, Seal Beach, San Clemente, and Malibu, also suffered significant damage. The destruction was not limited to just pier structures; numerous seawalls, decks, and stairways were torn apart, while 33 oceanfront homes were destroyed in the storm. Millions of cubic yards of sand were stripped from Southern California beaches, causing widespread erosion. Along the central coast, waves and high-tide flooding took a toll on the coastline, with bluffs eroding at an alarming rate. In Pacifica, just outside San Francisco, a 65-foot section of a bluff collapsed onto the beach, forcing the relocation of a two-story building and removal of an entire row of mobile homes. As a result of this erosion, many bluff-top homes and apartments were eventually demolished in the area, highlighting the fragility of California's coastline despite its rugged appearance. The El Niño phenomenon is building once again, and this time it's expected to be even more intense than previous events. As a coastal geologist with years of experience studying California's coastlines, I can attest that the conditions this year are ripe for significant damage. With the strong El Niño forecasted for 2026-27, homes along the coast are already experiencing issues due to increased erosion and flooding. The El Niño climate pattern is characterized by a shift in wind patterns that normally push warm waters from east to west along the equator. However, when these trade winds die down, the warm water pool in the western Pacific begins to flow back towards South America, causing a ripple effect on global weather patterns. This phenomenon can have far-reaching consequences, including powerful atmospheric river storms with heavy downpours that can wreak havoc on normally dry areas. Meanwhile, regions that are typically wet may experience droughts due to the disruption of usual weather patterns. As the warm water mass moves north towards California as a Kelvin wave, it brings significant impacts to the coast. One of the main concerns is the rise in sea level along the Pacific Coast, which can be elevated by up to 2 feet during these periodic events. The effects of El Niño on sea levels are well-documented, with the 1982-83 event being a prime example. During this time, sea levels were significantly higher than predicted high tides in cities like San Diego and San Francisco, highlighting the potential for devastating consequences along California's coastlines. The prolonged exposure of California's coastlines to elevated sea levels during an El Niño event can have far-reaching consequences for both public and private infrastructure. When sea levels are higher than usual, they can penetrate further inland, causing erosion and damage to coastal areas that were previously thought to be safe. This can lead to the destruction of homes, businesses, and other structures built along the coast. The combination of high sea levels and storm waves can also cause significant damage to public infrastructure such as streets, highways, bridges, piers, parks, and recreational facilities. The impact is not limited to private property; entire communities are affected by the loss of essential services and amenities. Much of California's coastal development took place during a period of rapid population growth from the late 1940s to the late 1970s when there were few concerns about coastal hazards and sea-level rise. This lack of awareness led to the construction of homes, businesses, and other structures on beaches, bluffs, and dunes. The arrival of El Niño in 1978 marked a turning point in California's understanding of its vulnerability to coastal hazards. The extreme event that followed just a few years later, the 1982-83 El Niño, caused significant damage to oceanfront property, recreational facilities, and large engineering structures designed to protect harbors from storm waves. The aftermath of the 1982-83 El Niño event led to a significant shift in the way people perceived the stability of oceanfront homes and shoreline development. Building restrictions were tightened, insurance rates increased, and many applications for new seawall permits were submitted. However, this newfound awareness was short-lived as coastal residents returned to their usual habits. The allure of owning an oceanfront property proved too great, with buyers competing fiercely for properties that had been damaged just a few years prior. In the years following the 1982-83 El Niño, California's coast experienced several large El Niño events, including those in 1997-98 and 2015-16. While these events caused significant damage, the increased use of coastal armoring, such as seawalls and rock revetments, helped to mitigate erosion. Additionally, the timing of large waves during these events coincided with low points in the monthly tidal cycle, resulting in less property damage than what was seen in 1982-83. This fortunate coincidence allowed for some degree of protection from the full force of the storms. The state's coast suffered a major blow in winter 2022-23 when high seas and waves caused an estimated $4.7 billion in economic losses along California's coastline. The combination of large storm waves, high tides, and elevated sea levels was eerily similar to the conditions experienced during early 1983. The state's latest climate assessment warns that more intense storms and increased erosion are on the horizon as temperatures rise and sea levels continue to increase. This warning has already been borne out in recent events, with the southern end of the state experiencing wave damage from an exceptionally busy Pacific hurricane season, also fueled by El Niño conditions. The severity of the emerging El Niño event is making it increasingly clear that coastal communities must prepare for a future where their current shoreline protection measures will not be sufficient. Each coastal neighborhood, city, and county has unique conditions and vulnerabilities to erosion and flooding, which will dictate how they respond to this new reality. While some are taking proactive steps such as stockpiling sandbags, clearing culverts, and developing evacuation plans, these efforts have their limitations when it comes to halting erosion. Building seawalls and rock revetments can provide temporary protection if designed correctly, but they also pose risks by altering the shoreline's natural dynamics. For instance, over time, these structures can lead to the loss of beaches as sea levels continue to rise. Moreover, adding more sand to eroded areas is a costly endeavor with limited long-term benefits. The cumulative effects of extensive shoreline development, eroding bluffs, aging infrastructure, and increased exposure to extreme weather events are placing immense pressure on coastal communities worldwide. Eventually, some will face the daunting task of transitioning from continuous shoreline protection to retreating from the coast, either through planned retreats or repeated damage. As the El Niño event unfolds, it has become evident that there is little developed coastal areas can do at this point to mitigate its impacts. Instead, they must focus on preparing to manage associated risks and adapting to an ever-changing future. California's coast is once again facing the threat of severe erosion due to El Niño conditions, which have been linked to devastating coastal damage in the past. The state's fragile coastline has been battered by strong waves and storm surges, putting communities at risk. In contrast, a more proactive approach was taken during the 1982-83 El Niño event, where scientists were able to provide critical information on potential erosion risks to policymakers. --- Source: [Phys.org](https://phys.org/news/2026-10-el-nio-threatening-california-fragile.html) Published by News Central Site: https://newscentral.site/california-s-coastline-threatened-by-powerful-storms-and-massive-waves/