Islands and Biblical Prophecies

Are there biblical prophecies that those who live on islands and coastal regions should know about? Are islands mentioned in the Old and New Testaments? Is there a massive earthquake prophesied to occur shortly after the gathering at Armageddon? How might islands be affected by that as well as scorching heat? Is there enough water to raise the sea levels by 270 feet? Will all in the islands perish? What about salvation? …