The 1887 Yellow River flood in Qing China began in late September 1887 and killed at least 930,000 people.
In 1887, this rising river, swollen by days of heavy rain, overcame the dikes on around 28 September, causing a massive flood.
Since there is no international unit to measure a flood's strength it is usually classified by the extent of the damage done, depth of the water, and the number of casualties.
The water of the Yellow River are generally thought to have broken through the dikes in Huayuankou, near the city of Zhengzhou in Henan province.
Owing to the low-lying plains near the area, the flood spread very quickly throughout Northern China, covering an estimated 50,000 square miles (130,000 km2), swamping agricultural settlements and commercial centers.