Causes and impacts of tornadoes

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Global issues climatic hazards
Causes and impacts of tornadoes
Causes
Tornadoes form in thunderclouds when the wind changes speed or direction near
the top. Cold air currents fall to the side of the rising air without cooling it. This
allows the cloud to grow bigger. The rising air starts to rotate, starting at the top
of the cloud and moving downwards. The rotating air continues downwards forming
a funnel. Air is drawn into the funnel entering an area of low pressure, causing it
to expand, cool and give up its moisture. The funnel is a tornado when it hits the
ground.
Impacts
Deaths and injuries
Winds pick up cars and destroy buildings
Large insurance claims
Causes less damage than hurricanes despite having higher wind speeds as
they are smaller and last only minutes whereas hurricanes are bigger and
last longer.

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