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The research finds major cities such as Honolulu, New Orleans and Miami will become increasingly vulnerable to elevated high tides and stronger storms fueled by the global heating caused by human activity. Beach and cliff erosion will exacerbate this situation.

The accelerating pace of sea level rise means that by the end of the century floods currently considered once in a lifetime, or once every 50 years or so, will become a daily high tide occurrence for more than 90% of the coastal locations assessed by researchers from the US government, the University of Illinois at Chicago and the University of Hawaii.

Within 30 years from now, these now-rare flooding events will become annual occurrences for more than 70% of the locations along the US coast according to the research published in Scientific Reports. This scenario threatens huge, multibillion-dollar damages and, potentially, the viability of some coastal communities.

“If future sea-level rise causes once extreme but rare floods to occur frequently then … this may render some parts of the US coastline uninhabitable,” said Sean Vitousek, a scientist at the US Geological Survey.

The disruption caused by frequent flooding will threaten the habitability of much of the US coastline as it is already widely projected to do to many low-lying islands in the Pacific, Vitousek added……. https://www.theguardian.com/environment/2020/apr/16/us-climate-change-floods-sea-level-rise