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Record-breaking heavy rain of more than 200 mm per hour fell in Henan Province in central China.
As the entire city turned into a sea of water, such as a subway carriage submerged in water, one person died and two went missing.
Correspondent Song Wook from Beijing.
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subway passengers are terrified as they wait for rescue in the shoulder-filled water.
The tunnel outside the carriage was also filled with water.
[Zhengzhou subway passengers: Firefighters arrived at the scene and rescued one by one.]
In the city center turned into a sea of water, cars float around, and people swept away by the torrent continue to drift away without being able to get out.
Meanwhile, citizens manage to rescue a woman using ropes.
Yesterday (20th) afternoon in Zhengzhou, Henan Province, central China, it rained up to 201 mm per hour.
This is the largest amount since weather observations began in 1951.
The rain for three days from the afternoon of the 17th to yesterday was 617 millimeters, which was close to the average annual rainfall of 640 millimeters in Zhengzhou.
Chinese media reported that at least one person was killed and two were missing in the torrential rains.
In Henan Province, 140,000 people have been displaced so far, and the economic damage is estimated at 73 million yuan, or about 13 billion won.
At an aluminum alloy factory in Dengfeng City, Henan Province, a large-scale explosion occurred when river water that overflowed from heavy rain came into contact with a high-temperature solution.
Factory workers evacuated in advance and there were no casualties.
China's meteorological authorities expect the heavy rains in the central provinces to continue into tonight.