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 Mississippi State Geologist estimated a final death toll of 233 persons, but 100 whites were still reported as hospitalized at the time. Because the white newspapers did not publish news about blacks until the 1940s and 1950s, historians have had difficulty learning the fates of blacks injured in the tornado. Based on this, historians now estimate the death toll was higher than in official records. Fire broke out at the segregated Lee County Training School, which was destroyed. Its bricks were salvaged for other uses.