Tropical cyclones are weather phenomena which form over the ocean through the release of energy generated by evaporation and saturation of water on the ocean's surface. This process results in heavy rain and strong winds and when these storms approach land they can cause damage and flooding to inhabited areas.

Storms which form in the Atlantic and northeast Pacific Oceans are called Hurricanes, in the Indian and south Pacific Oceans are called Cyclones, in the northwest Pacific Ocean are called Typhoons.

Fig. Cyclone Fani in the northern Indian Ocean on May 2, 2019 by FY-4A.

Fig. Cyclones Trevor and Veronica in north and west of Australia on March 23, 2019 by FY-4A.

Fig. Typhoon Yutu in the west Pacific on October 28, 2018 by FY-4A.

Fig. Globally seven cyclones on September 12, 2018 by FY-3D.