mega flood?

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A disastrous megaflood is coming to California, experts say, and it could be the most expensive natural disaster in history   CNN - August 13, 2022

Many Californians fear the "Big One," but it might not be what you think. It's not an earthquake. And it isn't the mega drought. It's actually the exact opposite. A megaflood. A new study by Science Advances shows climate change has already doubled the chances of a disastrous flood happening in California in the next four decades. And experts say it would be unlike anything anyone alive today has ever experienced. Daniel Swain, a climate scientist with UCLA and a researcher involved in the study, describes a megaflood as, "a very severe flood event across a broad region that has the potential to bring catastrophic impacts to society in the areas affected." He said a megaflood is similar to the 1,000-year flash flood events seen this summer in the St. Louis area and Kentucky, but across a much wider area, such as the entire state of California. These massive floods, which experts say would turn California's lowlands into a "vast inland sea," might have previously happened once in a lifetime in the state. But experts say climate change is increasing the likelihood of these catastrophic disasters, causing them to occur more like every 25 to 50 years.