The tornado that ravaged parts of Oklahoma recently was one of the most powerful tornadoes that have been recorded. It was formed by cold air meeting hot air meeting winds, and demonstrates that in the face of the worst that nature can offer humans are relatively powerless.
Much of the United States suffers from extreme weather events and much of it suffers from extreme natural events, like earthquakes. Humans are an ingenious species and can form settlements in places that are less than perfect for habitation, but do so at a cost to the environment.
The more we learn, the more we spoil and the more dangerous we make our life on this planet. We multiply voraciously. We race to survive in conditions here we put our survival at risk; the greater the risk that we create for ourselves the more ingenious we have to become to mitigate the risks we create. Where we cannot know something, because it is too complex for us to know or because we have not learnt the knowing of it, we have no choice but to guess, and many of our guesses are too optimistic: we believe that everything will come right in the end, but fail to understand that the end is not a desirable consummation.