In creating an adventure, there will be a major meterological event causing massive damage to the town's infrastructure. In the aftermath, there will be a pretty significant outbreak of at least one disease or plague. I've looked, but haven't found any statistics on plagues. I know Paladins are immune to normal disease, and some spells can cure disease, but nothing on actually getting infected, suffering from, or dying from any disease.
I have a rough idea on what it might do, but don't know if what I think will happen would be mild, significant, deadly, or TPK (besides the paladin).
Assuming the characters survive this (which I think will be somewhat difficult), do they get XP for surviving? How would I determine how much XP they should get for surviving? I figure some characters will get infected, and others may or may not get infected at all.