Tornado much different than building in a "risky spot", the single home that gets hit by a tornado is the guy that really gets screwed. If he has no insurance no one cares because it is not a big natural disaster.
I think most of us sympathize with these people, but they are naïve when they build back just hoping it won't happen again. Everytime I clean up my campground and campstore, riverhouse, bathhouse, etc. after a flood, I hope it won't happen again, but it will. I don't ask (or receive) govt. help and no one feels too bad for me because I live in a beautiful place where floods are expected to happen. This doesn't make it easier on me, but at least I understand the reality of the situation and am prepared to deal with it. Weather is changing and these events will become more and more common, we will have to use some tax money to deal with infrastructure improvements following these disasters, but at some point it is up to the individuals to take responsibility, and I'm sure the vast majority do.