Currently, northern China is experiencing its first large-scale heatwave of the year, with many regions adopting a "barbecue mode". Henan and Hebei have broken local records for the highest temperature in May, and the northern winter wheat region may experience dry and hot winds. The ground temperature in many parts of the northern region has exceeded 70 ℃, and the large-scale high temperature in the north continues. On May 20th, the ground temperature in the high temperature area generally exceeded 50 ℃. Among them, the ground temperature at Tongxin Station in Ningxia reached 70.1 ℃, Pingyao reached 70.3 ℃, and Yongji in Shanxi reached 71.1 ℃. In the afternoon, it reached 71.5 ℃, not only breaking the local May ground temperature record, but also the second highest record of the year, second only to 71.9 ℃ on June 13, 2024. Why is the high temperature so strong in Henan and Hebei provinces, where there is a record breaking amount of heat? According to experts, the weather in Henan and Hebei is clear and cloudless, with increased solar radiation and a significant increase in heat received during the day, leading to rapid warming. At the same time, this area is located at the eastern foot of the Taihang Mountains, and the airflow passing over the Taihang Mountains causes sinking and warming, leading to further temperature rise. Under the continuous sunny and hot weather with little rain, some areas in the north are experiencing drought. Currently, there are varying degrees of meteorological drought in the eastern part of Northwest China to North China and the Huang Huai region. Winter wheat growing areas such as southern Hebei, western and northern Henan, southern Shanxi, and Guanzhong in Shaanxi will also have 2 to 4 days of dry and hot wind weather. At present, winter wheat in northern China is in a critical period of yield formation. Local farmers need to pay attention to the implementation of "one spray and three prevention", or use micro sprinkler irrigation equipment to spray water in a timely and appropriate manner, cool down and humidify, and reduce the impact of dry and hot air on wheat filling. How long will the high temperature last? Experts say that the duration of this high temperature will not be too long. Under the joint influence of cold air and cooling, the temperature in most parts of the north will gradually decrease on the 22nd, and the range of high temperatures will be significantly reduced; On the 23rd, the temperature will further drop, and the cumulative cooling in some areas can reach more than 15 ℃, with a clear contrast between hot and cold. Large scale high temperature strikes, take advantage of the "heat" and accept this heatstroke prevention guide. How to correctly prevent heatstroke in high temperature weather? Proper sun protection and hydration are important! ·Even if you are not thirsty, you should drink water in moderation. Try to avoid outdoor activities during the high temperature period in the afternoon. The key to avoiding heatstroke is to avoid hot and humid environments. Don't take it lightly when driving out, prepare polarized sunglasses. Pay attention to your daily routine at home, ensure sleep, have a light diet, and if necessary, prepare commonly used heatstroke prevention and cooling drugs (New Press)