Core Points - Typhoon "Haikashan" made landfall in Guangdong Province on September 24, with maximum wind speeds of 13 levels (40 meters per second) and a minimum central pressure of 955 hPa [1] - The National Defense General and the Ministry of Water Resources initiated emergency responses to flood risks in multiple provinces, including upgrading Guangdong's response to level III [1] - The Guangdong Provincial Water Resources Department maintained a level I emergency response and managed reservoir operations to alleviate downstream flood pressure [2] Group 1 - Typhoon "Haikashan" is expected to move westward at a speed of 20-25 kilometers per hour, gradually weakening [1] - The Ministry of Water Resources dispatched three working groups to assist flood prevention efforts in Guangdong, Guangxi, and Hainan [1] - The Pearl River Water Resources Commission is maintaining a level II emergency response and issuing targeted warnings based on risk assessments of 151 small rivers and 188 areas prone to mountain floods [1] Group 2 - The Guangdong Provincial Water Resources Department has effectively reduced downstream flood pressure by managing reservoir storage of 0.45 billion cubic meters [2] - The Guangxi Water Resources Department sent five expert teams to coastal areas to guide flood prevention efforts [2] - The Hainan Water Resources Department is monitoring reservoir safety and has deployed six expert teams for on-site guidance [2]

Core Viewpoint - The continuous heavy rainfall in Sichuan province has led to increased pressure on flood prevention efforts, particularly for aging and potentially hazardous reservoirs, while also presenting an opportunity for water storage as the flood season approaches its end [1][2][3]. Group 1: Flood Prevention Challenges - Sichuan has issued yellow rainstorm warnings for three consecutive days, with September experiencing multiple rounds of heavy rainfall, which is unusual for this time of year [1]. - The provincial flood control command has activated four level-four flood emergency responses since late August, compared to only one response during the same period last year [2]. - The region's reservoirs, many of which are old and in poor condition, face significant challenges due to the prolonged heavy rainfall, which can lead to structural instability [2]. Group 2: Reservoir Conditions and Management - Sichuan has over 8,000 reservoirs, with more than 170 large and medium-sized ones, playing crucial roles in flood control, irrigation, water supply, and power generation [2]. - Over 80% of the reservoirs were built between the 1950s and 1970s, with a high proportion being small and earth-rock dams, which are often below standard and pose risks [2]. - The current rainfall provides a valuable opportunity for water storage, which is critical for addressing water shortages in the winter and spring [5]. Group 3: Future Water Storage Plans - The provincial water resources department is preparing for water storage efforts as the flood season concludes, emphasizing the need to increase reservoir water levels while ensuring flood safety [5]. - Recent rainfall has already led to increased water levels in several major reservoirs, indicating a positive trend for upcoming water storage initiatives [5].