It could well be a playing out of Old Testament wrath of God, as the forces exist to allow much of California to simply fall into the sea.
  https://www.nationalgeographic.com/science/2019/08/hidden-earthquake-risk-discovered-under-los-angeles/

“The Wilmington fault, as it’s called, is an elusive type of fracture. Unlike many faults, which crack Earth’s surface like an egg, the Wilmington fault is “blind,” which means it’s concealed beneath the surface, making it especially difficult to study. So while scientists have long known the fault is present—stretching 12.4 miles under southern Los Angeles into San Pedro Bay—it was presumed to have sat quiet for millions of years. Now, a new analysis of the system, published in Bulletin of the Seismological Society of America, suggests that isn’t the case. Using a cluster of clues incorporated into a three-dimensional model, the study authors posit that the fault has been active much more recently than once thought—and likely still poses a risk to people on the surface. “I hope bringing attention to it can potentially increase safety in the region,” says study author Franklin Wolfe, a doctoral candidate who is part of Harvard’s structural geology and Earth resources group. While the fault is slow moving and likely ruptures only once every 3,200 to 4,700 years, it underlies two of the United States’ busiest ports. And researchers worry that the Wilmington could link with other nearby faults to produce a temblor as strong as a magnitude 7.4.”

     The big one, the coming of a major, or a series of major earthquakes in California is what will do the sinking into the sea:
  https://www.dailymail.co.uk/sciencetech/article-4336986/Ancient-quakes-point-sinking-risk-California-coast.html

“The Big One may be overdue to hit California, but scientists near LA have found a new risk for the area during a major earthquake. They claim that if a major tremor hits the area, it could plunge large parts of California into the sea almost instantly. The discovery was made after studying the Newport-Inglewood fault, which has long been believed to be one of Southern California’s danger zones. The fault runs under densely populated areas, from the Westside of Los Angeles to the Orange County coast. Major earthquakes on the fault centuries ago caused a parts of Seal Beach near the Orange County coast to sink 3ft in just seconds. In total three quakes over the last 2,000 years on nearby faults made ground just outside Los Angeles city limits sink as much as 3ft. Today that could result in the area ending up at or below sea level, said Cal State Fullerton professor Matt Kirby, who worked with the paper´s lead author, graduate student Robert Leeper. The study showed that land within major Californian seismic faults could sink by 1.5 and three feet instantly.”

     As a fundamentalist Christian, I see this as the will of God.