Harm of cold wave

Harm of cold wave: 1, the severe cooling caused by cold wave will cause freezing damage to crops; 2. The heavy snow and freezing rain brought by the cold wave may crush power lines and break telephone poles, and may also cause traffic hazards. The strong wind accompanying the cold wave may destroy buildings and farms, and may also cause casualties.

Cold wave grade

The cold wave warning signal is divided into four levels, which are represented by blue, yellow, orange and red respectively. The blue warning signal means that the minimum temperature will drop by more than 8℃ within 48 hours, and the minimum temperature is less than or equal to 4℃; The yellow warning signal means that the minimum temperature will drop by more than 10℃ within 24 hours, and the minimum temperature is less than or equal to 4℃; The orange warning signal means that the minimum temperature will drop by more than 12℃ within 24 hours, and the minimum temperature is less than or equal to 0℃; Red warning signal means that the minimum temperature will drop 16℃ or more within 24 hours, and the minimum temperature is less than or equal to 0℃.

Matters needing attention in cold wave attack

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.

3. Families who use coal stoves for heating should be alert to gas poisoning.

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

5. Issue accurate cold wave news or alarm, so that ships at sea can return in time.

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