Hurricanes form over warm ocean waters near the equator when low pressure systems cause warm, moist air to rise and rotate due to the Coriolis effect. They have a circular shape with strong winds and heavy rain that spiral inward towards the eye of the storm. Hurricanes strengthen over warm ocean waters but can weaken when winds disrupt the storm's structure, it moves over cooler waters, or makes landfall where the warm moisture source is cut off. They pose powerful threats through high winds, heavy rainfall that causes flooding, and storm surges that raise sea water levels greatly during coastal impact.
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