I read an interesting essay this week from July 2015 in Cracked.com describing a first-person experience with an EF5 tornado, in this case the one that hit Moore OK in May 2013. The story really brings home the need to prepare for unexpected disasters and what you can do to prepare for your own bad situation. You can read it at https://www.cracked.com/personal-experiences-1744-5-things-you-learn-surviving-f5-tornado.html.
