A cyclone is a large, rotating storm system that has organized thunderstorms and strong winds. The term can refer to both tropical cyclones (hurricanes or typhoons) in the tropics as well as extratropical cyclones in mid-latitude regions. Cyclones are fueled by warm, moist air that rises rapidly, creating a low pressure center at the surface. As the storm system moves, it can bring heavy rain, strong winds, and even tornadoes to affected areas.