At 10:16 am on November 16, 2025, the Tongbai County Meteorological Observatory issued a blue warning signal for a cold wave: it is expected that the lowest temperature in the townships under Tongbai County will drop by more than 10 ℃ in the early morning of the 18th compared to the early morning of the 16th. The lowest temperature in the early morning of the 18th will be -4 ℃ to -2 ℃. From the 16th to the 17th, there will be northerly winds of 4-5 levels and gusts of 7 levels or above. Relevant units and individuals are advised to take precautions. Defense Guidelines: 1. The government and relevant departments should prepare for the cold wave according to their responsibilities. 2. Agriculture, forestry, and animal husbandry should be prepared for frost damage to crops, trees, and livestock. 3. Relevant departments should adjust residential heating according to the situation, and coal-fired heating users should pay attention to preventing carbon monoxide poisoning. 4. Relevant units and residents should pay attention to wind prevention, close doors and windows, and reinforce outdoor structures. 5. Individuals should pay attention to adding clothes and keeping warm. Elderly and weak patients, especially those who are sensitive to temperature changes such as cardiovascular and asthma patients, should reduce their outings.