2011 Joplin tornado
Overall, the tornado killed 158 people (with an additional three indirect deaths), injured some 1,150 others, and caused damages amounting to a total of $2.8 billion. It was the deadliest tornado to strike the United States since the 1947 Glazier–Higgins–Woodward tornadoes, and the seventh-deadliest overall.
Waffle House Index
The term was coined by FEMA Administrator Craig Fugate in May 2011, following the 2011 Joplin tornado, during which the two Waffle House restaurants in Joplin remained open.