A storm, a tropical storm, cyclone, typhoon, hurricane, that rapidly intensifies.

风暴、热带风暴、气旋、台风、飓风等都会迅速加剧。

Scientists call these storms cyclones when they happen just north or south of the equator in the Indian Ocean.

科学家称这些风暴气旋发生在印度洋赤道的北部或南部。