claim: The most vulnerable parts of the West Antarctic ice sheet could raise the sea level by 10 to 15 feet, inundating many of the world’s coastal cities, though most scientists think that would take well over a century, or perhaps longer.
evidence: In 2018, scientists concluded that high sea levels some 125,000 years ago, which were 6–9 m ( 20–30 ft ) higher than today, were most likely due to the absence of the WAIS, and found evidence that the ice sheet collapsed under climate conditions similar to those of today.