'Created by climate changes, and the massive amounts of impurities thrown up by the war, chemical-storms are savage, toxic thunderstorms of terrible ferocity. Heralded by strange colors in the skies, a heavy, acrid chemical/ozone smell and multi-colored lightning, the rain they produce contains concentrated heavy metals, toxins, chemical weapons traces and radioactive particles.
The chem-storms that occurred soon after the ‘nuclear winter’ effect subsided were capable of stripping paint, killing and burning plant life, and blinding, burning and even killing people by toxic shock. Over time they have become less powerful, but are still potent enough to blister and burn.'
http://www.furaffinity.net/full/1024274/ Here's the link, the sky is what I'm talking about.
A better explanation is in http://www.furaffinity.net/view/1744127/
'Created by climate changes, and the massive amounts of impurities thrown up by the war, chemical-storms are savage, toxic thunderstorms of terrible ferocity. Heralded by strange colors in the skies, a heavy, acrid chemical/ozone smell and multi-colored lightning, the rain they produce contains concentrated heavy metals, toxins, chemical weapons traces and radioactive particles.
The chem-storms that occurred soon after the ‘nuclear winter’ effect subsided were capable of stripping paint, killing and burning plant life, and blinding, burning and even killing people by toxic shock. Over time they have become less powerful, but are still potent enough to blister and burn.'
Mebbe this will give you an idea or two.
I borrowed the concept from real-world studies, and several books and movies, then added my own twists.