An aerial drone photo taken on July 4, 2025 shows a view of Dujiangyan irrigation system in southwest China's Sichuan Province. Dujiangyan irrigation system on the Minjiang River saw a flood peak on Friday. [Photo/Xinhua]

China's State Flood Control and Drought Relief Headquarters activated a Level-IV flood control emergency response for Sichuan province on Sunday.

The move follows forecasts from meteorological authorities predicting moderate to heavy rainfall, with some areas receiving heavy to torrential rains, across the Sichuan Basin from Sunday through Tuesday.

China's national observatory renewed a yellow alert for rainstorms on Sunday, saying that heavy rain and torrential downpours are anticipated from 8:00 a.m. Sunday to 8:00 a.m. Monday across broad regions, including parts of Jiangsu, Shanghai, Anhui, Henan, Hubei, Hunan, Guizhou, Yunnan, Sichuan, Chongqing, Shaanxi, Inner Mongolia and Heilongjiang.

China has a four-tier color-coded weather warning system, with red representing the most severe, followed by orange, yellow and blue. The emergency response system has four tiers, with Level I being the most severe.