The Nucular Destruction

It has been five years since World War 4 had ended. The sky remaining dark with smoke, the sun unseen. Everything had been destroyed by nuclear rays or has decayed. People started to change from the unknown fumes in the air. No one knows what these fumes are or if the effects are reversible. Very few people were immune to the fumes, the ones who aren't, well. They turned into terrifying creatures, with faces like rats and bodies tall, bony and blue as the once blue sky.