The death toll has climbed in the central China city of Zhengzhou as it grapples with the aftermath of flooding, pumping water from tunnels, thick mud on roads, and cleaning up debris. More questions over the authorities’ preparedness have been raised on China’s social media. Twelve million people in Zhengzhou city experienced severe rainfall since Saturday, and the city saw record-breaking downpour between 4:00 p.m. to 5:00 p.m. local time on Tuesday, with more than 201 mm (8 inches) in one hour, according to the meteorological authority. The water on the street was almost waist high on Tuesday afternoon, but subways kept operating until a train was forced to stop due to water flowing into the tunnel. Over 500 commuters became trapped in darkness. Many experienced vomiting, shaking, and heavy breathing as water reached near the top of the carriage. According to the regime, a dozen passengers died. Desperate videos and …