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The conditions that lead to the formation of tornadoes are most often met in the central and southern US, where warm, humid air from the Gulf of Mexico collides with the cool, dry air from the Rockies and Canada. ----. Tornadoes can also occur elsewhere, though, including all parts of the US, Europe, Asia and Australia.
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This area, popularly called "the tornado alley", extends roughly from the Rocky Mountains to the Appalachians, and from Lowa to the Gulf of Mexico |
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The safest place to be during a thunderstorm is in a building, preferably with a lightning rod |
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According to the national statistics, the average annual number of deaths by lightning in the US is 89 |
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Between 1950 and 1999, there were an average 27 deaths due to tornadoes each year in the month of April |
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With wind speeds in excess of 251mph, these tornadoes are capable of lifting houses off their foundations |