The cold wave warning signal is divided into four levels, represented by blue, **, orange and red respectively.
(1) Cold wave blue warning signal
Standard: The minimum temperature will drop more than 8℃ within 48 hours, and the minimum temperature will be less than or equal to < /p>
4℃, on land The average wind strength can reach level 5 or above or it has dropped more than 8°C, the minimum temperature is less than or equal to 4°C, and the average wind the speed has reached level 5 or higher and can continue.
Defense Guide:
1. The government and relevant departments should prepare for cold waves in accordance with their responsibilities;
2. to stay warm;
3. Take certain protective measures for tropical crops and aquatic products;
4. Prepare wind protection.
(2) Cold wave ** early warning signal
Standard : The minimum temperature will drop more than 10℃ within 24 hours, and the minimum temperature will be less than or equal to
4℃, on land. The average wind strength can reach level 6 or above or it has dropped more than 10°C, the minimum temperature is less than or equal to 4°C, and the average wind speed has reached level 6 or above and could continue.
(3) Orange cold wave warning signal
Standards: The minimum temperature will drop more than 12℃ within 24 hours, the minimum temperature is less than or equal to 0 ℃, and the average wind force on land can reach level 6 or above; Or it has dropped more than 12°C, the minimum temperature is 0°C or lower, and the average wind speed has reached level 6 or above; and can continue.
(4) Cold wave red warning signal
Standards: The minimum temperature will drop more than 16℃ within 24 hours, the minimum temperature is lowerure or equal to 0℃, and the average wind force on land can reach level 6 or more; Or it has dropped more than 16°C, the lowest temperature is 0°C or lower, and the average wind speed has reached level 6 or above; and can continue.
Defense Guide:
1. The government and relevant departments shall carry out emergency and rescue works to prevent cold waves in accordance with their responsibilities;
2. Pay attention to protection against cold and heat;
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3. Agriculture, aquaculture, livestock, etc. should actively take antifreeze, antifreeze and other cold protection measures to minimize losses;
4. Do a good job of wind protection.