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.
Tornado outbreak of April 6–9, 1998
The tornado was at the time the seventh deadliest in Alabama history, killing one more person than in a tornado that hit Alabama on March 21, 1932; a young boy died nine days after this event from head injuries. His father was paralyzed from the waist down, and his mother suffered severe injuries. Another mother and her two children, despite taking shelter in their underground basement, were killed when hundreds of pounds of debris was blown onto them. Overall, 32 people were killed by the tornado and hundreds more were injured.