- They are called Cyclones or depressions in the Bay of Bengal,
- Hurricanes in the Caribbean Sea,
- Typhoons in China and Japan and
- Willy-willy in Australia.
The answer is nothing. Collectively, they are called "tropical cyclones" and they are all equally destructive. South of the equator they spin clockwise instead of the counter-clockwise we are used to in north of the equator, but even still they are just as dangerous.