It is expected that on the 11th-12th, affected by warm and humid airflow, western Guangdong and the Pearl River Delta will be accompanied by the indoor resurgence of the "back to the south day" phenomenon, it is recommended: 1, close the doors and windows to prevent outdoor warm and humid airflow from entering the room; 2, susceptible to moisture and mildew items should be sealed and stored in advance; 3, do not mop the floor, it is best to use a dehumidifier or open the air conditioning dehumidification mode indoors. 4, a new cold air south to blow the north wind (the 13th is the best 14th), and then open the window for ventilation. (Guangdong Weather)