Horror of Zhengzhou subway and tunnel floods, Is Henan Flood a natural disaster or a man made one

The severe rainfall in Henan caused a major flood, resulting in heavy casualties in Zhengzhou and other places, which was officially declared as a disaster once in a thousand years. However, was the flood really a purely natural disaster, or was it another manmade disaster What tactics are being used by Chinese Communist Party officials to maintain stability and to shirk responsibility On July 20, many places in northern Henan Province were devastated by a huge rainstorm. The Zhengzhou city was completely flooded and paralyzed. Videos on social networking sites showed many residents swept away by the water and a large number of vehicles floating on the surface; three subways in Zhengzhou city were also submerged by tumbling floodwaters, with the deepest depth exceeding 2 meters. Zhengzhou Jingguang Road Tunnel, a 4 km long tunnel with twoway six lanes, was filled with flood water in five minutes during the rush hour on July 20 Hundreds of cars were trapped in the tunnel and