How to prevent cold wave? How to reduce the harm caused by cold wave?

The rain and snow brought by the cold wave will reduce visibility, ground icing, road snow and strong wind, which poses a great threat to the safety of roads, railways, aviation and maritime transportation.

Cold wave prevention

1. When the temperature drops suddenly, pay attention to add clothes to keep warm, especially the hands and face.

2. Close the doors and windows and fix the outdoor structure.

Be careful when you go out.

4. The old, the weak, the sick and the disabled, especially those who are sensitive to temperature changes such as cardiovascular patients and asthma patients, should try not to go out.

5. Pay attention to rest and don't be overtired.

6. Beware of gas poisoning, especially for families that use coal stoves for heating.

7. The weather forecast should be strengthened, and accurate cold wave news or alarm should be released in advance.

8. Issue accurate cold wave news or emergency report, so that ships at sea can return in time.

9. Prepare crops and herds for cold protection in advance.

Cold wave is a kind of disastrous weather in winter, and people are used to calling it cold wave. The so-called cold wave is a weather process in which cold air from the north invades China on a large scale, resulting in a large-scale sharp cooling and northerly winds. Cold waves generally occur in late autumn, winter and early spring. According to the regulations of China's meteorological department, if the temperature drop caused by cold air intrusion reaches more than 10℃ and the lowest temperature is lower than 5℃ in one day, it is called a cold wave process. It can be seen that not every cold air heading south is called a cold wave.

Severe weather such as severe cold, strong wind and frost brought by the cold wave will adversely affect industrial and agricultural production and people's lives. When the cold wave brings frost, the temperature will drop below 0℃, and the water in plant cell gaps will freeze. When water freezes, its volume will increase, which will produce a kind of pressure, so that the water in the cells will continue to penetrate outwards, resulting in dehydration of cells and partial withering or complete death of plants. ? Farmers in China have accumulated rich experience in defending against cold wave and frost. For example, before frost occurs, methods such as smoking, irrigation and mulching should be used to increase the temperature of farmland and soil to reduce the harm of frost to crops.