Emergency communication system
161 people were killed and at least 990 injured when an EF5 multiple-vortex tornado hit Joplin, Missouri. Because Joplin is located in a tornado-heavy area of the country, many people considered the tornado sirens routine and ignored them. Instead, many residents waited until they received confirmation from another, non-routine, source, such as seeing the tornado, a radio or TV report, or hearing a second siren. In the aftermath, an assessment team recommended that emergency warnings take risk perception into account to convey a sense of urgency. NOAA Officials are considering ways to change the warning system to distinguish smaller tornadoes from more deadly ones.
Tupelo, Mississippi
The spring of 1936 brought Tupelo one of its worst-ever natural disasters, part of the Tupelo-Gainesville tornado outbreak of April 5–6 in that year. The storm leveled 48 city blocks and over 200 homes, killing 216 people and injuring more than 700 persons. It struck at night, destroying large residential areas on the city's north side. Among the survivors was Elvis Presley, then a baby. Obliterating the Gum Pond neighborhood, the tornado dropped most of the victims' bodies in the pond. The storm has since been rated F5 on the modern Fujita scale. The Tupelo Tornado is recognized as one of the deadliest in U.S. history.