Core Viewpoint - The recent heavy rainfall in Guangdong is attributed to a combination of meteorological factors, including a low vortex system and the southwest monsoon, leading to significant flooding and related disasters in the region [1][4][5]. Group 1: Causes of Heavy Rainfall - The heavy rainfall is primarily caused by a low vortex system, which acts similarly to a typhoon but is generated over land, creating strong upward airflows that draw in moisture [4]. - The southwest monsoon is providing ample warm and moist air, which fuels the rainfall [4]. - The interaction between the low vortex and the southwest monsoon has been ongoing since early August, leading to continuous heavy rainfall in Guangdong [4]. Group 2: Impact and Consequences - The rainfall has resulted in urban flooding, fallen trees, and even landslides, with cities like Guangzhou, Zhaoqing, and Qingyuan being significantly affected [1][4]. - The phenomenon known as the "train effect" has caused successive thunderstorms to impact the same areas, exacerbating the rainfall intensity [4]. Group 3: Forecast and Future Conditions - Meteorological authorities predict that the heavy rainfall will cease by August 7, as the low vortex moves away from Guangdong [7]. - Following the rain, temperatures are expected to rise, with highs ranging from 34°C to 37°C, as the subtropical high-pressure system regains control [7].

Summary of Key Points Core Viewpoint - The recent continuous rainfall in Guangdong has raised questions among residents regarding its intensity, causes, and duration, with significant weather warnings issued across the region [2][3]. Group 1: Rainfall Intensity - Shenzhen issued a citywide red rainstorm warning for the first time since Typhoon "Mangkhut" in 2018, indicating severe weather conditions [3]. - Hong Kong recorded 355.7 millimeters of rain on August 5, breaking the record for the highest daily rainfall in August since 1884 [3]. - Over a 24-hour period, 28 towns in Guangdong experienced extreme rainfall, with the highest recorded at 470.6 millimeters in Huizhou [5]. Group 2: Causes of Rainfall - The rainfall is attributed to a combination of uplift mechanisms and abundant moisture, with a cold vortex acting similarly to a typhoon, creating strong upward motion and drawing in moisture [6][8]. - The southwest monsoon has been a significant contributor, bringing warm, moist air into Guangdong, which, combined with the cold vortex, has led to persistent heavy rainfall [8][10]. Group 3: Comparison with Northern Rainfall - The rainfall in Guangdong differs from that in northern regions, as the latter is influenced by cold air masses and warm moist air converging, while Guangdong's rain is more akin to typhoon rain mechanisms [10][11]. Group 4: Future Weather Outlook - The cold vortex is expected to move out of Guangdong, leading to a decrease in rainfall intensity as the subtropical high pressure pushes the system northward [14]. - After the rain subsides, temperatures in Guangdong are anticipated to rise, transitioning to a hot and humid weather pattern [15][17].

Core Insights - The Philippines has experienced significant devastation due to multiple tropical cyclones, resulting in 30 fatalities and over 5.29 million people affected [1] - Agricultural losses are reported to exceed 760 million pesos (approximately 95 million RMB), while infrastructure damages surpass 5 billion pesos (around 620 million RMB) [1] - A total of 154 municipalities across the country have declared a state of disaster [1]

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].