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[[Image:Katrina.jpg|right|250px|thumb|Hurricane Katrina devastating [[New Orleans]].]]

[[Image:Katrina.jpg|right|250px|thumb|Hurricane Katrina approaching [[New Orleans]].]]

A '''hurricane''' is a powerful, swirly [[storm]] that begins over a warm [[ocean]]. Hurricanes form in [[water]]s near the [[equator]], and then they move north. Hurricane [[wind]]s swirl about the [[eye]], a calm area in the center of the storm. The band of tall, dark clouds surrounding the eye is called the eyewall. The eye is usually 10 to 40 miles in diameter and is free of [[rain]] and large [[cloud]]s. In the eyewall, large changes in [[pressure]] create the hurricane's strongest winds. These winds can reach nearly 200 mph. Damaging winds may extend 250 miles from the eye.

A '''hurricane''' is a powerful, swirly [[storm]] that begins over a warm [[ocean]]. Hurricanes form in [[water]]s near the [[equator]], and then they move north. Hurricane [[wind]]s swirl about the [[eye]], a calm area in the center of the storm. The band of tall, dark clouds surrounding the eye is called the eyewall. The eye is usually 10 to 40 miles in diameter and is free of [[rain]] and large [[cloud]]s. In the eyewall, large changes in [[pressure]] create the hurricane's strongest winds. These winds can reach nearly 200 mph. Damaging winds may extend 250 miles from the eye.