Surviving the Cataclysm is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

This sounds like a thrilling dystopian saga where a cataclysm turns the world into a wasteland. Some people find refuge in fortresses, others hide in the wilderness, and some transform into different beings due to radiation. The world is divided into two extremes: the elite possess advanced technology, using fortresses to isolate themselves from the chaos.