the us seems especially vulnerable, louise kara, from panama, wanted to know why, why are there so many hurricanes in the usa? hurricanes are tropical cyclones. they're extreme wind speeds and heavy rains can cause massive damage. can strike fear into the hearts of many hurricanes can reach a few 100 kilometers in diameter and rage over the same spot. for hours they form near the equator, over large bodies of water warm to 26 degrees celsius or more. only storms that develop over the atlantic or over the eastern and central pacific are called hurricanes. the hurricane season runs from june until late november. that's when large amounts of water evaporate and rise with a warm air. as the earth rotates air masses, north and south of the equator, are deflected by what's known as the cory oldest force. these masses start to spin, producing a swirling cyclone. at its center is the eye of the hurricane, a wind and rain fries own with few clouds. when such cyclones form and tropical or sub tropical zones, they usually move in a westerly or north westerly direction. in the atlantic, this means