原标题：唠"科"话丨这轮广东的雨为啥这么大？ 新华社广州8月7日电（记者田宇、胡拿云）这几天，广东出现大范围强降雨过程，让人感觉"雨下 个没完"。广东省防汛防旱防风总指挥部从3日至5日连续将防汛应急响应从Ⅳ级调整至Ⅱ级。国家防减 救灾委6日对广东启动国家四级救灾应急响应。在广州、肇庆、清远等地，出现内涝、树木倾倒、甚至 发生山洪、道路塌陷。广东这轮降雨为何下得如此猛烈？它又将持续到何时？ 这轮降雨强度为何这么大？ 要解析这轮强降雨的成因，不妨先从降雨的基本原理说起。简单来讲，形成降雨需要三个核心条 件：一是"动力抬升机制"，二是"充足的水汽"，三是"较多的凝结核"——空气中悬浮的尘埃、烟尘等微 粒，能让水汽更易附着、聚集，进而形成云层。具体可以这样理解：当含有大量水汽的湿润空气快速上 升时，由于高空温度较低，水汽会因降温而凝结成雨滴，最终落到地面形成降雨。 要解开广东本轮强降雨的成因，不妨聚焦几个关键的气象"推手"： 首先是抬升机制源于低涡。它和台风很像，甚至可以形容为"在陆地上的台风"。低涡生成于陆地， 一般覆盖范围在200公里至2000公里以内，而台风生成于海上，通常覆盖范围在2000公里以上。在北半 球 ...

智通财经7月26日电，菲律宾国家减灾委发布消息称，截至7月26日早6时，受今年的第6号台风"韦帕"、 第7号台风"范斯高"、第8号台风"竹节草"以及西南季风等天气系统的综合影响，菲律宾已有30人死亡， 7人失踪，受灾人口超过529万。此外，菲律宾在农业方面遭受的损失超过7.6亿比索（约合人民币9500 万元），在基础设施方面遭受的损失超过50亿比索（约合人民币6.2亿元），全国范围内已有154个市镇 宣布进入灾难状态。 (央视新闻) 多个热带气旋夹击致菲律宾30人死亡 超529万人受灾 ...

Core Viewpoint - The article highlights the impact of Typhoon "Danas" and the southwest monsoon, leading to significant rainfall in several regions of China, raising concerns about potential geological disasters and urban flooding [1][2]. Summary by Sections Weather Forecast - The remnants of Typhoon "Danas" are located in Meizhou, Guangdong, and are expected to move southwest at a speed of 5 to 10 kilometers per hour [2]. - From July 10 to 12, heavy to torrential rain is forecasted in Fujian, southern Jiangxi, southern Hunan, Guangdong, Guangxi, and central and southern Guizhou, with some areas experiencing extreme rainfall [2][6]. - Specific regions, including eastern and southern Fujian, most of Guangdong, and parts of Guangxi, are expected to see rainfall amounts of 250 to 300 millimeters, with localized areas exceeding this [2][6]. Rainfall Warnings - The Central Meteorological Observatory has issued an orange alert for heavy rain as of July 10, indicating the potential for severe weather conditions [2]. - Rainfall predictions include short-term heavy precipitation, with maximum hourly rainfall expected to reach 30 to 60 millimeters, and localized areas possibly exceeding 80 millimeters [2][6]. Regional Impacts - The forecast also includes scattered heavy rainfall in regions such as Yunnan, the Sichuan Basin, southern Shaanxi, and parts of northern and western North China, with some areas experiencing moderate to heavy rain [4]. - From July 11 to 12, additional rainfall is expected in northeastern Inner Mongolia, central Heilongjiang, eastern and southern Jiangnan, and much of southern China, with some areas facing heavy rain [7][9].