What are the levels of typhoon response?

Typhoon response is divided into four levels: level I, level II, level III and level IV, among which four colors, blue, yellow, orange and red, are used for convenience. Level I response is organized and led by the director of the National Disaster Reduction Committee; Level II response is organized and coordinated by the Deputy Director of the National Disaster Reduction Committee (Minister of Civil Affairs); Level III response is organized and coordinated by the Secretary General of the National Disaster Reduction Committee; The level IV response is organized and coordinated by the Office of the National Disaster Reduction Committee.

Typhoon is a kind of tropical cyclone. Tropical cyclone is a low-pressure vortex that occurs on the surface of tropical or subtropical oceans, and it is a powerful and profound "tropical weather system". In China, tropical cyclones in the South China Sea and the Northwest Pacific are classified into six grades according to the maximum average wind speed near the bottom center, and the wind near the center reaches 12 or above, which is collectively called typhoon.

Broadly speaking, the word "typhoon" is not the intensity of tropical cyclones. Tropical cyclones (including tropical storms, severe tropical storms and typhoons defined by the World Meteorological Organization) with sustained wind speeds of17.2m per second are called typhoons.

On informal occasions, "typhoon" even directly refers to the tropical cyclone itself. When the tropical cyclone in the northwest Pacific reaches the intensity of a tropical storm, it is given a name. The name is provided by Typhoon Committee 14 of the World Meteorological Organization.