Experts predicted a one in 100 trillion chance homes would be struck twice. May 21, 2013 — -- For the residents of Moore, Okla., the damage wrought by Monday's E-F5 tornado was all too familiar.

OKLAHOMA CITY, Oklahoma (CNN) -- When a powerful tornado struck Oklahoma City recently, it caused a breakdown in internal hospital systems, such as elevators and electricity powering critical ...

What is Tornado Alley? Find out the states most affected, when tornadoes peak, and how often they strike. In this article, we ...