How many winds are typhoons?

Typhoon warning has four grades: blue, yellow, orange and red.

Typhoon blue warning means that the average typhoon wind force is above 6; Yellow warning means that the average wind force of typhoon reaches 8 or above; The orange warning indicates that the average typhoon wind force is above 10, and there may be flash floods at this time; The red warning means that the typhoon's average wind force is above 12, so it is necessary to prepare for evacuation at any time.

Typhoon is a very strong tropical cyclone, usually formed in the tropical ocean and then pushed inland. They are formed by warm and humid air currents and low-pressure systems in tropical oceans. With the continuous development of cyclones, the wind speed will gradually accelerate, and cyclones will be accompanied by the formation of clouds and the emergence of strong storms.

The arrival of a typhoon usually brings a series of effects. First of all, strong winds may cause ships at sea to capsize, destroy buildings and even cause traffic accidents. Secondly, rainstorm is the main destructive factor brought by typhoon, which will cause floods, landslides and mudslides. In addition, strong winds and heavy rains may also lead to the interruption of power and communication lines, affecting people's lives and work.

Typhoon prevention measures:

1. First of all, we should pay attention to listening to and understanding the local weather forecast, especially the trend and early warning information about typhoons. After receiving the typhoon warning, you should take immediate action and take preventive measures.

2. Second, ensure the safety of the residence. If your residence may be affected by the typhoon, reinforce the doors and windows in advance to prevent them from being broken or flying in. At the same time, it is necessary to ensure that the hanging objects on the building and the items that are easy to be blown by the wind are firm, so as to avoid danger caused by being blown down by the wind.

3, prepare enough emergency supplies. Including food, drinking water, medicines, flashlights and other necessary items. These materials can be stored during the typhoon to ensure the basic needs of life.

4. Avoid going out during the typhoon. If you must go out, wear non-slip shoes and avoid walking on loose materials. At the same time, it is necessary to avoid being close to dangerous areas such as rivers, lakes and beaches to avoid accidents.

5. Note that power and communication lines may be interrupted. After the typhoon, there may be power and communication line failures, so it is necessary to know the relevant information in advance and take countermeasures.