[sls]

I just googled "what island nations have been submerged" and looked at the top six links. They are all about islands that have been submerged, are on the brink of being submerged, or will be submerged soon if recent sea rise trends continue for a very short time.

[bazzert]

from the guardian article (first link) ... "The missing islands, ranging in size from 1 to 5 hectares (2.5-12.4 acres) were not inhabited by humans."

Other links were mostly "could","will","may" etc.