AdvertisementBig-Box Stores' Hurricane Prep Starts Early04:20Download AudioResumeAugust 26, 2011Jon HamiltonfacebookEmailA convoy of Walmart trucks waited to enter New Orleans on Sept. 1, 2005, after the city was battered by Hurricane Katrina. Government agencies said the massive storm taught them that big-box retailers need to be an integral part of hurricane preparation and relief efforts. (AFP/Getty Images)