Warm water and warm air found in the tropics and converging winds form the ideal basis for hurricane formation. Some scientists speculate that changes in temperature may also contribute to the process and that global warming accounts for an increase in hurricanes.
A hurricane begins to form when moisture from the water meets cooler air up above. This process becomes a cycle that causes cloud formation. Near the surface of the water, converging winds increase warm air circulation and wind speed, while higher wind currents push the rising warm air outwards. This helps to bring about the cyclical motion characteristic of hurricanes.