User blog comment:JERealize/What lies beyond Panem?/@comment-134.117.251.54-20131210014635

my theory;

Panem, as we know, contains part of Mexico and parts of Canada, but has mostly the USA. The other countries of North America likely perished from natural disasters.

South America: Cut off from North America likely and the lowest parts flooded. The Andes mountains likely inhabited by advanced civilizations. Brazil and other regions likely have civilizations as well within them.

Europe: much of the coastlines and isles are gone, leaving various parts of Europe left. Parts of France, Spain and Germany, gone. UK and Ireland entirely gone. Scandanavia likely is islands now  from the mountains and for the most part cut off. Sparesely inhabited as trade is difficult. Eastern Europe more populous and thriving. Particularly Russia.

Asia: islands are likely all gone and the mountain regions are the most populated, avoiding volcanoes and coast lines. Some countries likely merged, such as India and Pakistan, to share the remaining resources after much of the coast was flooded.

Africa: Coasts flooded, desserts in the sahara mostly swampland now. Africa thriving for the most part and doing far better than many parts of the world. Cut off slightly more since the bottom of Spain and the middle east likely flooded a bit, but still able to trade with southern Europe and parts of Asia.

Australia: Mostly uninhabited. Coasts flooded, desserts turned to swamps. Wildlife everywhere. Small human popiulations developing a small nomadic civilization since trade is impossible now, and the resources that they have access to will be only on the Island now. New Zealand gone except for perhaps a few small island from mountains, animals won out, no humans.