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.
2011 Joplin tornado
As of May 2013, the official death toll from National Weather Service was listed at 158 while the City of Joplin listed the death toll at 161 (158 direct). The list was up to 162, until one man's injuries were found to be unrelated to the event. In one indirect fatality, a policeman was struck by lightning and killed while assisting with recovery and cleanup efforts the day after the storm. Shortly after the tornado, authorities had listed 1,300 people as missing, but the number quickly dwindled as they were accounted for. Many people were reported to have been trapped in destroyed houses. Seventeen people were rescued from the rubble the day after the tornado struck.
The Missouri Emergency Management Agency reported more than 990 injured. Of 146 sets of remains recovered from the rubble, 134 victims had been positively identified by June 1. Due to the horrific injuries suffered by some victims, some different sets of remains were from a single person. On June 2 it was announced that four more victims had died.