This area has had a stable sea level for several thousand years, but that's all changing. NOAA predicts a 10-12 inch (25-30 cm) sea level rise by 2050 and perha

This area has had a stable sea level for several thousand years, but that's all changing. NOAA predicts a 10-12 inch (25-30 cm) sea level rise by 2050 and perhaps 3-4 times that by 2100. https://www.noaa.gov/news-release/us-coastline-to-see-up-to-foot-of-sea-level-rise-by-2050 https://www.noaa.gov/news-release/us-coastline-to-see-up-to-... Of course, during the Last Glacial Maximum, sea levels were 125 meters lower (~25,000 - 20,000 years ago), and there's a lot of evidence that the Americas were inhabitated by at least small human populations by then (although many of their settlements are likely now buried by marine sediments).