Group 1 - The high temperature in Hangzhou reached 39.3℃, making it the highest in the province and the second highest in the country on August 21 [1] - The weather conditions included not only high temperatures but also strong convective weather, with multiple weather warnings issued for thunderstorms and heavy rain in various districts [1] - The forecast indicates that the high temperatures will persist, with maximum temperatures remaining between 37℃ and 39℃ for the upcoming week, and the perceived temperature may exceed 40℃ [1] Group 2 - Although artificial rain is not expected, localized thunderstorms are likely to occur in the coming days, providing brief and uneven rainfall in Hangzhou [2] - Typhoon "Lingling" formed on August 21 and made landfall in Japan, but it is not expected to alleviate the high temperatures in the region [2]

Core Viewpoint - The emphasis is on enhancing meteorological services and flood-drought prevention measures to ensure public safety and stability during critical weather periods [1][2] Group 1: Meteorological Services - The provincial meteorological bureau is urged to improve its warning system, ensuring comprehensive coverage and timely dissemination of information to the public [1] - The importance of artificial rainfall technology is highlighted, with a call for better integration of technical support and practical exploration to enhance its effectiveness [1] Group 2: Flood and Drought Prevention - The current flood season is recognized as critical, with a need for heightened vigilance and detailed execution of prevention measures to mitigate the risks of simultaneous drought and flooding [2] - Emphasis is placed on strengthening meteorological monitoring and early warning systems, as well as ensuring the safety of water conservancy projects and urban flood drainage systems [2] - There is a focus on risk assessment and emergency preparedness, including the need for material support for rescue teams and regular emergency drills to improve response capabilities [2]

Summary of Key Points Core Viewpoint - The article discusses the severe drought conditions in Shaanxi province, China, and the measures taken by local authorities to mitigate the impact on agriculture through artificial rainmaking techniques. Group 1: Drought Conditions - Shaanxi province has experienced high temperatures and low rainfall since spring, leading to severe soil moisture loss and affecting over 4 million acres of crops by mid-May [1] - The provincial emergency response for drought was activated in April, with various departments implementing measures such as water source management and irrigation [1] Group 2: Artificial Rainmaking Efforts - On May 21, a cold front allowed for large-scale artificial rainmaking operations to commence, providing much-needed rain to drought-stricken areas [1] - The artificial rainmaking process involves using silver iodide as a catalyst to promote water vapor condensation in clouds, enhancing precipitation [1] - On May 22, a coordinated effort across 11 cities and 86 counties in Shaanxi resulted in 367 ground operations and 5 aircraft operations, significantly contributing to rainfall in the affected areas [2] Group 3: Future Plans and Technology - The use of advanced systems in rainmaking aircraft allows for precise weather detection and effective cloud seeding, enhancing the efficiency of operations [2] - Continuous monitoring and pre-planning for artificial rainmaking will be essential to capitalize on favorable weather conditions in the future [2][3]

Group 1 - The article discusses the drought situation in China, highlighting measures taken in various summer grain-producing regions to mitigate the impact of drought [1][2][3] - Jiangsu province has implemented advanced irrigation techniques, including automated monitoring systems and smart irrigation, which have significantly improved water efficiency and crop yield [1][3] - In Jiangsu, a total of 13.1 billion cubic meters of water has been diverted this year, which is double the amount compared to the same period in the last five years [1] Group 2 - In Gansu province, artificial rainmaking operations have been conducted extensively, resulting in some areas receiving over 10 millimeters of rainfall, which has allowed farmers to begin planting crops [2][4] - Efforts to enhance water efficiency include modernizing irrigation channels and maintaining water supply infrastructure, which has improved water delivery capacity by 40% in certain areas [3][5] - The Central Meteorological Observatory forecasts that the drought conditions may persist, emphasizing the need for ongoing monitoring and potential artificial rainmaking to alleviate drought impacts during the summer harvest [5]

化云为雨：人工增雨并非凭空造雨 "气象部门积极开展人工增雨作业，助力旱区旱情缓解。但是，人工增雨作业不是凭空造雨，需要满足 一定的气象条件。"中国气象局人工影响天气中心研究员楼小凤说。 "针对5月20日以来的大范围降水过程，华北、西北地区抓住有利天气条件，积极组织开展人工增雨作 业。"中国气象局人工影响天气中心效果评估室主任王飞说。 统计显示，截至25日17时，青海、内蒙古、陕西等省份开展飞机增雨作业32架次，累计飞行时长102小 时；甘肃、陕西、山西等省份组织地面增雨作业1488次。初步估算，作业影响面积约73.2万平方公里， 增加降水约5.6亿吨。 据了解，今年以来，全国共开展飞机增雨作业553架次，地面增雨作业约1.7万次。 "考虑到今年我国多地受旱情影响，今年地面作业量与去年同时期相比增加约20%，作业影响面积和增 雨量与去年同期相比分别增加27%和29%。"王飞说，人工增雨在旱情缓解、土壤墒情改善、防灾减 灾、水库增蓄、降低森林火险和生态环境保护等方面发挥了积极作用。 新华社北京5月26日电题：面对旱情，如何用好人工增雨助"解渴" 新华社记者刘诗平 今年以来，我国多地出现旱情，农业生产、群众生活不同 ...

新京报讯（记者王景曦）今年5月，西北地区、北方部分地区出现重度及以上气象干旱。5月22日前后， 北方出现一轮大范围降水过程，国、省、市、县各级气象部门抓住有利时机，组织开展多轮人工增雨作 业，初步估算，本轮北方地区人工增雨作业影响面积约为68.3万平方公里，增加降水约5亿吨。 记者了解到，目前人工增雨是通过向云中撒播催化剂（盐粉、干冰或碘化银等），也可利用声波、飞秒 激光、带电粒子等手段，促进水汽凝结、云滴碰并增长等云雨转化过程，形成降水落到地面。人工增雨 不等于人工降雨，催化剂的作用就像是"卤水点豆腐"。只有在自然云符合增雨作业条件时，人工增雨才 能发挥作用。 山西省气象局针对降水过程统筹协调，开展空地协同人工增雨作业。截至24日8时，开展飞机人工增雨 作业3架次，地面增雨作业217次，旱情得到有效缓解。 截至23日8时，青海、内蒙古、陕西等地共计开展飞机增雨作业32架次；甘肃、陕西、山西等地共组织 地面增雨作业1316次。 初步估算，本轮北方地区人工增雨作业影响面积约为68.3万平方公里，增加降水约5亿吨，有效缓解了 旱情，并可增加库塘蓄水、降低森林火险等级。 5月20日至21日，中国气象局人工影响天气中 ...

Core Viewpoint - Nanjing Meteorological Bureau announced the implementation of artificial weather modification through rocket-induced rainfall from May 4 to May 6 [1] Summary by Relevant Sections - **Announcement Details** - The artificial rainfall operation will be organized by the Nanjing Meteorological Bureau [1] - The operation will take place in specific areas including "Zhu Zhen Town Da Quan Village," "Long Chi Street Xin Ji Tou Qiao Village," and "Pukou District Meteorological Bureau" [1] - The operational area will cover a radius of 10 kilometers around the designated points [1]