For Ben Grimm walking around in a tornado isn't as much of a problem as it might be fore most, so long as he doesn't get hurled around. Not because it'll hurt him, but because he'll probably fly through a few walls. But before, during, and after the storm he'll be willing and ready to help clear a path for people to get somewhere safe.

Afterward he'll be all over cleaning the village up. Someone has to do the heavy lifting.