Incidents like this tornado and its consequences are, frankly, easier explained by atheism. Taking God out of the equation makes such devastation and loss easier to understand, namely, that we live on a planet that is not always so nice to live on, and that powerful natural forces can do us in at any time.
No need to ponder 'why didn't God intervene' and 'why does he allow...?' and so on and and on, if there is simply no God.