Aerial photo taken on Aug. 18, 2020 shows the flooded area in Ciqikou ancient town of Shapingba District, southwest China's Chongqing Municipality. Chongqing Municipality, located along the upper reaches of the Yangtze River, was hit by severe flooding on Tuesday. A Level I emergency response was therefore issued for flood control. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 18, 2020 shows the flooding water in southwest China's Chongqing Municipality. Chongqing Municipality, located along the upper reaches of the Yangtze River, was hit by severe flooding on Tuesday. A Level I emergency response was therefore issued for flood control. (Xinhua/Liu Chan)

A rescuer is seen on duty near the Ciqikou ancient town in Shapingba District, southwest China's Chongqing Municipality, on Aug. 18, 2020. Chongqing Municipality, located along the upper reaches of the Yangtze River, was hit by severe flooding on Tuesday. A Level I emergency response was therefore issued for flood control. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 18, 2020 shows flooded area in Ciqikou of Shapingba District, southwest China's Chongqing Municipality. Chongqing Municipality, located along the upper reaches of the Yangtze River, was hit by severe flooding on Tuesday. A Level I emergency response was therefore issued for flood control. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 18, 2020 shows flooded area in Ciqikou of Shapingba District, southwest China's Chongqing Municipality. Chongqing Municipality, located along the upper reaches of the Yangtze River, was hit by severe flooding on Tuesday. A Level I emergency response was therefore issued for flood control. (Xinhua/Liu Chan)

Photo taken on Aug. 18, 2020 shows the flooding water near Chaotianmen Wharf in southwest China's Chongqing Municipality. Chongqing Municipality, located along the upper reaches of the Yangtze River, was hit by severe flooding on Tuesday. A Level I emergency response was therefore issued for flood control. (Xinhua/Liu Chan)

Photo taken on Aug. 18, 2020 shows the flooding water near Chaotianmen Wharf in southwest China's Chongqing Municipality. Chongqing Municipality, located along the upper reaches of the Yangtze River, was hit by severe flooding on Tuesday. A Level I emergency response was therefore issued for flood control. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 18, 2020 shows a rescue boat at the flooded area in Ciqikou of Shapingba District, southwest China's Chongqing Municipality. Chongqing Municipality, located along the upper reaches of the Yangtze River, was hit by severe flooding on Tuesday. A Level I emergency response was therefore issued for flood control. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 18, 2020 shows the flooded area in Ciqikou ancient town of Shapingba District, southwest China's Chongqing Municipality. Chongqing Municipality, located along the upper reaches of the Yangtze River, was hit by severe flooding on Tuesday. A Level I emergency response was therefore issued for flood control. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 18, 2020 shows the flooding water in southwest China's Chongqing Municipality. Chongqing Municipality, located along the upper reaches of the Yangtze River, was hit by severe flooding on Tuesday. A Level I emergency response was therefore issued for flood control. (Xinhua/Liu Chan)