Disaster close to home

Uprooted trees, damaged church building, lost of electricity, empty shelves in the frozen sections. This is what i saw as we drove to Super Walmart on friday. A tornado had hit that area that i frequent on thursday afternoon. I used to take no regards to the warnings I received so many time
during my stay here. After seeing the scary sight, I will think twice heading out if I received a warning. Since I had been so sheltered from natural disaster, I never know what to do if I really encounter one. What to do? Where to hide? What to take? Geezz....I think I should find out more if I am preparing to live in US for while.