Is the average time that you have to take shelter when a tornado warning is issued in Tornado Alley, this area where 1,396 twisters have hit the ground in 2017, killing 35 people.
Is the time that Moore’s inhabitants had in 2013 to save their lives when an F-5 tornado, the most violent storms with winds between 261 and 318 mph, touched the ground. This Oklahoma City suburb lost 10 people, including 7 children.
Is the time that Joplin’s people had to take shelter in 2011 when the deadliest tornado since 1950 in the US stroke this 50,000 people city in Missouri, killing 161 of them.
Many companies offer tornado shelters that decrease significantly the risk of being trapped under debris or took away by the winds. But the average cost of that kind of shelter is 5,068 dollars. Not every private individual or municipalities have the means to buy one of them.
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