The images do not need to depict devastation, only the impression which the photographer had. To me the images are interesting and refreshing, perhaps not documentary but show a different and more emotional element to the aftermath of a tornado.
I see a lot of desolation in these both, and something draws me to the uncanny elements of the first one. Certainly there is a ghostly feel when witnessing a disaster area.
Of course, if I didn't know these were depicting a tornado I wouldn't have known - to me though that isn't such an important part, but i don't consider these to be objectively documentary either.