Tidal height data during the floods in 1954 and 2020 in the Yangtze Estuary

==>The data file includes hourly tidal height data in the Yangtze Estuary, China, including gauges Datong, Wuhu, Maanshan, Nanjing, Zhenjiang, Jiangyin, Xuliujing, and Wusong, during the flood period of 1954 (15 July to 15 August) and 2020 (1 July to 31 July).==>The tidal height are referenced to the Wusong datum, the mean low water at the Wusong gauge.==> The data are collected from hydrological books of the Yangte River and regional water resources management departments (www.cjh.com.cn; www.jsswj.com.cn).==> The data are used to evaluate the results related to paper to be published in AGU Advances (2026), entitled 'Tidal river flood risk highest during intermediate rather than peak river discharge', authored by Guo Leicheng etc. Further details and illustrations of the data can be found in the paper.