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].

Summary of Key Points Core Viewpoint - The Guangdong Meteorological Service Center has issued warnings for heavy rainfall in the region, indicating that the rain will not only continue but may intensify over the next few days [2][4]. Group 1: Weather Forecast and Warnings - From April 4 to 5, southern coastal areas are expected to experience heavy to extremely heavy rainfall, with localized areas facing severe conditions [4]. - As of April 4, red rainstorm warnings have been issued for several counties including Longmen, Heyuan, and Dongguan, while orange and yellow warnings are also in effect for other areas [2][5]. - The "train effect" phenomenon is causing continuous heavy rainfall in the same regions, leading to significant accumulation of rainwater [2]. Group 2: Emergency Response - The Huizhou Flood Control Command has activated a Level IV emergency response plan due to the anticipated heavy rainfall [4]. - Residents are advised to be vigilant against geological hazards such as landslides and flash floods, particularly during the night of April 4 to the morning of April 5 [5].

Group 1 - The core viewpoint of the article highlights the severe impact of the recent heavy rainfall in Beijing, which peaked on July 28, 2025, leading to significant flooding and the displacement of over 80,000 residents [1][2][3] - The rainfall lasted for 147 hours, with an average precipitation of 210.4 mm across the city, and the maximum recorded in the Miyun District reached 573.5 mm, which is significantly higher than the average annual rainfall for that area [2][3] - The heavy rainfall has been attributed to the geographical features of Beijing, particularly the mountainous regions that occupy about 62% of the city's area, which create conditions for intense rainfall through orographic lift [13][15] Group 2 - The Miyun Reservoir, a critical water source for Beijing, has been releasing water to manage the flood situation, with a total discharge of 1.2 billion cubic meters, equivalent to the volume of 8.5 West Lakes [3][11] - The article emphasizes the importance of Miyun District, which serves as a key geographical and hydrological point for the city, with historical significance reflected in its long-standing infrastructure, including the Great Wall [4][11] - The interaction between the mountainous terrain and water systems is crucial for understanding the historical and current hydrological dynamics of Beijing, as many rivers originate from the surrounding mountains [21][22]

Core Viewpoint - The article discusses the severe flooding in Beijing due to extreme rainfall, highlighting the impact on infrastructure, emergency responses, and the ongoing weather conditions. Group 1: Rainfall and Weather Conditions - Beijing experienced a total rainfall of 543.4 millimeters over four days, which is nearly equivalent to the city's average annual precipitation of about 600 millimeters [4] - The rainfall event lasted for 147 hours, starting from July 23, with the heaviest downpours occurring in the northern and western parts of the city [5][6] - The phenomenon known as "train effect" caused prolonged heavy rainfall in certain areas, leading to significant accumulations [6] Group 2: Emergency Response and Impact - As of July 28, 30 fatalities were reported due to the flooding, with the majority occurring in the Miyun district [4] - A total of 80,332 people have been evacuated from affected areas, with the highest numbers from Miyun, Huairou, and Fangshan districts [8] - The National Disaster Reduction and Relief Committee activated a level four emergency response, allocating 200 million yuan for recovery efforts in severely impacted areas [8][9] Group 3: Infrastructure Damage - The flooding caused damage to 31 roads, with 16 routes still not repaired, and 136 villages experienced power outages [8] - Communication infrastructure was also affected, with 62 optical cables damaged and 1,825 base stations out of service [8] Group 4: Water Management - The Miyun Reservoir, a crucial water source for Beijing, has seen a significant increase in inflow, with 7.3 billion cubic meters entering and 1.2 billion cubic meters released as of July 29 [11][10] - The reservoir's outflow rate was recorded at 1,120 cubic meters per second, impacting downstream river levels [11]

Group 1 - The heavy rainfall in Beijing lasted for 147 hours, with a total precipitation of 543.4 millimeters, which is nearly equivalent to the city's average annual rainfall of approximately 600 millimeters [2][4] - The rainfall event has led to significant flooding, resulting in the death of 30 individuals, with the majority occurring in the Miyun district [1][4] - A total of 80,332 people have been evacuated from affected areas, with the highest numbers from Miyun, Huairou, and Fangshan districts [4] Group 2 - The Central Meteorological Observatory predicts that the heavy rainfall will gradually weaken and end by July 30, with the focus shifting to the East China region due to the influence of Typhoon "Zhu Jie Cao" [2] - The "train effect" meteorological phenomenon has been identified as a cause for the prolonged heavy rainfall, where successive rain bands repeatedly affect the same area [3][2] - The Ministry of Finance and the Ministry of Emergency Management have allocated 3.5 billion yuan in disaster relief funds to support emergency rescue and recovery efforts across nine provinces, including Beijing [5] Group 3 - The Miyun Reservoir has seen a significant increase in inflow due to the heavy rainfall, with a total inflow of 7.3 billion cubic meters and a discharge of 1.2 billion cubic meters as of July 29 [6] - The reservoir's current discharge rate is 1,120 cubic meters per second, with downstream river levels remaining high [6] - Satellite imagery indicates that while some areas around the Miyun Reservoir are flooded, efforts to manage water levels have been effective in slowing the rise [7]

Core Viewpoint - The recent heavy rainfall in northern China, particularly in Beijing and Hebei, is attributed to abnormal atmospheric circulation patterns, with the subtropical high pressure system playing a significant role in the early onset of the rainy season [1][3]. Group 1: Weather Patterns and Impacts - The subtropical high pressure has shifted northward, leading to an influx of warm, moist air into northern China, which has resulted in extreme rainfall events [1][2]. - The average rainfall in the North China region has reached 121 mm, which is nearly 30% higher than the historical average for the same period [2]. - The rainy season in North China began on July 5, 13 days earlier than the historical average, marking the earliest start since 1961 [2][3]. Group 2: Typhoon Influence - Typhoon "Zhu Jie Cao" has been reclassified and is expected to impact eastern China significantly, with strong winds and heavy rainfall predicted in several regions [4]. - The typhoon indirectly affects the rainfall patterns in northern China by altering the atmospheric circulation, which influences the subtropical high pressure's position and intensity [4]. Group 3: Future Weather Forecast - A strong rainfall event is anticipated in northern China, with warnings issued for potential mountain floods and geological disasters due to cumulative rainfall effects [5]. - The overall precipitation trend is expected to weaken, but localized heavy rainfall may still occur [5].

Group 1 - The recent heavy rainfall in northern China has been influenced by a combination of factors, including stable subtropical high pressure, prolonged convective activity, and orographic lifting from the Yanshan and Taihang mountains [2][4] - Specific areas such as Yixian in Hebei and Miyun in Beijing have experienced localized rainfall exceeding 400 to 500 millimeters, approaching their annual average precipitation [2] - The current heavy rainfall event is expected to gradually diminish by the 30th, as the subtropical high pressure retreats southward and moisture transport decreases [4] Group 2 - Typhoon "Zhu Jie Cao" is expected to impact the eastern China region, with forecasts indicating it may make landfall on the 30th, bringing significant rainfall to areas like southern Jiangsu, Shanghai, and eastern Zhejiang [5][7] - The typhoon's trajectory suggests it will slow down as it moves inland, necessitating close monitoring of its potential for sustained rainfall in the eastern regions [7] - The weather patterns indicate a shift from northern heavy rainfall to increased precipitation in the eastern coastal areas due to the typhoon's influence [5]

Core Viewpoint - Beijing has issued a red rainstorm warning, indicating severe weather conditions with expected rainfall exceeding 150mm in most areas and potentially reaching 300mm in some locations, posing high risks of natural disasters such as flash floods and landslides [1][2]. Group 1: Weather Conditions - The red rainstorm warning was upgraded from an orange warning within three hours, highlighting the intensity of the rainfall [1]. - Rainfall from July 24 to 25 reached an average of heavy rain levels, with significant short-term rainfall recorded in northern areas, including 95.3mm in one hour in Dongyu, Huairou, and a total of 315.3mm over six hours in Huangtuliang, Miyun [1]. - Continuous heavy rainfall was observed, with an average of 34.9mm recorded from 6 AM on July 27 to 6 AM on July 28, indicating persistent heavy rain conditions [1]. Group 2: Meteorological Analysis - The extreme rainfall in northern mountainous areas was attributed to the uplift effect of southwest warm moist air from the edge of a subtropical high, causing continuous rain band formation [2]. - The weather pattern is expected to change, with the influence of a high-altitude shortwave trough and the ongoing warm moist conditions, leading to significant rainfall and potential severe convective weather, including thunderstorms and hail [2]. - Rainfall is expected to continue into the night of July 28, with a shift to localized severe convective weather expected on the afternoon of July 29 [2]. Group 3: Public Advisory - Meteorological authorities advise the public to stay updated on weather forecasts and warnings due to the rapidly changing weather conditions and to take necessary precautions [3].