But the summer solstice is not hot. This year, the summer solstice has just arrived, and the "heat" continues in many parts of China. In Xuchang, Henan Province, the high temperature weather in recent days led to the fracture and uplift of cement pavement. Nationwide, since June 13, China has witnessed its first regional high-temperature process this year, with a wide range of impacts. As of June 21, a total of 508 high temperature warnings have been issued by cities and counties at all levels in China, of which Shaanxi Meteorological Observatory has issued a high temperature red warning, Anhui and Shandong Meteorological Observatory has issued a high temperature orange warning, and the temperature in many places has exceeded 40 ℃. Why is this "heat wave" so strong? "Since June, the water vapor conditions in the lower troposphere of the Huang Huai Region have deviated. Especially after the middle of the year, the air above the Huang Huai Region is controlled by the high-pressure ridge, and the downdraft has strengthened the warming effect. At the same time, the atmosphere is dry and the ground is rapidly warming due to the influence of solar short wave radiation during the day." Yuanyuan, chief on duty during the flood season of the National Climate Center, said that it is expected that a long-term high-temperature weather process may occur in the Middle East of Jiangnan and the Middle East of South China in the midsummer of this year. Extreme heat and high temperature bring great challenges to production and life. Due to high temperature and little rain, the soil moisture in Southern Hebei, Henan, Western and southern Shandong, Northern Jiangsu and Anhui and other places deviates, and the drought continues in some areas, which has an adverse impact on the seeding and emergence of summer corn and summer soybean. In addition, high temperature also brings about a sharp increase in power load. On June 19, the maximum load of North China Power Grid reached 249.01 million KW, a new high since the beginning of the summer, and the highest power load in Henan hit a record high; The maximum power load of Jiangsu Power Grid exceeded 100million kilowatts on the 17th of this month, 19 days earlier than the first time in 2021. At the same time of high temperature in many provinces in China, there are also rare heat waves in many parts of the world. The average maximum temperature in central India has reached a new high in 122 years. The hot and dry weather has also affected the local crop harvest and intensified the risk of forest fire. After the hottest May in at least 100 years, Spain ushered in an abnormal high temperature in the first ten days of June; Since April, the temperature in France has been higher than normal for more than 30 consecutive days. The French meteorological agency said the temperature appeared too early for this season. It is reported that about one third of France has begun to implement water restriction measures, urging farmers, factories and public service providers to save water. Rare heat waves have hit many parts of the world, testing the limits of human survival. World Meteorological Organization spokesman naris said that due to climate change, the heat wave came earlier. If greenhouse gas emissions continue to rise, global warming will be even greater. What we are experiencing at present is only a "harbinger of the future". This is by no means alarmist. According to the assessment of the sixth report of the United Nations Intergovernmental Panel on climate change (IPCC), the vast majority of populated places in the world will have more, stronger and more lasting extreme high temperatures in the future. Even if the goal of controlling global warming within 1.5 ℃ is finally achieved, this risk cannot be completely avoided. The above report also lists a series of data. From 1850 to 1900, the extreme high temperature event occurred only once in 50 years on average. Under the current climate, it occurred about once every 10 years; Achieve the temperature control target of 1.5 ℃, about once every 5 years; However, if the global temperature is allowed to rise to 4 ℃, it will encounter at least one equally severe high temperature every year. "In the face of these 'future omens', we must first do a good job in scientific prediction, early warning and prevention, as well as impact and risk assessment, and do a good job in prevention and response in key areas, major projects and infrastructure construction, so as to reduce the disasters caused by them." Huting, associate researcher of the climate change monitoring and prediction Office of the National Climate Center, believes that it is more important to recognize that global warming is leading to an increase in high impact extreme weather events such as high temperature and heat waves. Relevant experts pointed out that in recent years, in addition to the impact of relevant natural factors, human factors are the main reasons for global warming: excessive emissions of greenhouse gases such as carbon dioxide, extensive use of fossil fuels, excessive meat consumption and excessive luxury consumption. "In the future, with the further intensification of climate warming, the frequency and intensity of sudden floods, droughts and strong typhoons will also increase. It is urgent to reduce greenhouse gas emissions and slow down global warming." Said huting. (outlook new era)