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Hurricanes only form over warm ocean waters near the equator
The warm, moist air over the ocean rises upward
Because this air moves up and away from the surface, there is less air left near the surface.
Air from surrounding areas with higher air pressure pushes in to the low pressure area.
This "new" air becomes warm and moist and rises, too.
As the warm air continues to rise, the surrounding air swirls in to take its place.
As the warmed, moist air rises and cools off, the water in the air forms clouds.
The whole system of clouds and wind spins and grows, fed by the ocean's heat and water evaporating from the surface.
This is how hurricanes form.
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