Jiangzhou.
Later known as Jiujiang, it is located in the middle and lower reaches of the Yangtze River. Due to its low-lying terrain and dense river networks, it has historically been prone to flood disasters.
This flood struck too suddenly; the embankments of counties like Jiujiang, Pengze, and Hukou near the river in Ganbei collapsed entirely, turning the scene from Hankou to Jiujiang into a "water and sky as one". In the entire middle and lower reaches of the Yangtze River, once Jiujiang breaches, it would cause flood backflow in the Poyang Lake basin, resulting in large-scale disasters in Jiangxi, Hubei, Anhui, and other regions.
