Tornadoes happen during storms when warm air and strong winds being to spin upwards.
These distinct funnel-shaped winds can cause great damage along their paths.
Central states such as Kansas and Oklahoma see the majority of the USA's tornadoes.
In fact, there is a famous tornado 'route' though ten midwestern state which is know as 'Tornado Alley'.
Homes in that area often have storm cellars where families can shelter from the weather.
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