Powerful tropical storms occur all around the world, but what they're called depends on where they form.
When one of the deadliest storms ever recorded in the Southern Hemisphere roared through Mozambique, Malawi and Zimbabwe in March, it was called Cyclone Idai. But the big blow that sideswiped Guam in February was Typhoon Wutip. And if the swirl of nasty weather coalescing over the Gulf of Mexico strengthens as expected this week, it will be Tropical Storm (or maybe even Hurricane) Barry.
What makes a major storm a hurricane, a typhoon or a cyclone? It comes down to location.