BEIJING, Aug. 9 (Xinhua) -- The Ministry of Water Resources activated a Level IV flood-control emergency response on Saturday for five provincial-level regions, as heavy to torrential rains are predicted to sweep across vast parts of the country in the coming days.

From Aug. 9 to 11, intense rainfall is expected to batter Henan, Hubei, Chongqing, Sichuan, Shaanxi, Anhui, and Gansu, where the alert was already in place, with some areas facing extreme downpours.

The downpours may cause sharp water level rises in the upper and middle reaches of the Yangtze and Huaihe Rivers, while some small and medium-sized rivers in high-risk areas could exceed warning levels.

The ministry has urged local authorities to step up real-time monitoring of rainfall and river conditions, issue timely public alerts, and enhance urban waterlogging-prevention measures.

Special emphasis should be placed on mitigating risks in smaller rivers and ensuring early evacuations of residents in dangerous areas, according to the ministry.

The State Flood Control and Drought Relief Headquarters on Saturday initiated a Level-IV emergency response for flood control in the provincial-level regions of Jiangsu, Anhui, Hubei, and Chongqing.

The headquarters' office has dispatched work teams to Anhui and Hubei to assist and guide flood control efforts, according to the Ministry of Emergency Management.

On Saturday evening, the Ministry of Water Resources and the China Meteorological Administration jointly issued an orange alert for mountain torrents in parts of Henan, Hubei and Sichuan from Saturday night to Sunday night, noting that such disasters could also occur in other regions due to heavy rainfalls and urging local authorities to strengthen real-time monitoring, flood prevention alerts and precautionary evacuations.

China has a four-tier weather warning system, with red representing the most severe warning, followed by orange, yellow and blue.