During the 2012 apocalypse, a massive earthquake of a unknown magnitude struck the country, and volcanoes engulfed the area, killing millions of people. When the Worldwide Flooding occurred, a mega-tsunami at the height of 1500 meters swept away Turkey, submerging it underwater.
As a result of the apocalypse, Turkey is submerged underwater. However when the floodwaters began to recede after time was reset to year one, Turkey had risen and is presumed to have become habitable
- Turkey at Wikipedia