Category 11 winds are also called hurricanes, with speeds reaching 118 kilometers per hour to 133 kilometers per hour. They are rare hurricanes on land and are extremely destructive. If they occur at sea, they will cause storm surges. According to the Beaufort wind scale, wind can be divided into 13 levels from 0 to 11 according to wind speed.
Wind level:
1. Level 0 wind is also called calm wind.
2. Wind level 1-2 is called light breeze. There is a slight sound on the leaves, and the face feels windy.
3. Winds of level 3-4 are called gentle breezes. The branches of trees shake and can blow up dust and paper on the ground.
4. Winds of level 5-6 are called strong winds, big branches are shaking, wires are whirring, and it is difficult to walk with an umbrella.
5. Winds of level 7-8 are called strong winds. The twigs of trees can be broken, and the resistance to walking in the wind is very great.
6. Winds of magnitude 9-10 are squally and are rare on land. They can uproot trees and cause serious damage to buildings.
7. Winds above magnitude 11-12 are called typhoons or hurricanes (called typhoons in the Pacific), which are extremely destructive and rarely seen on land.