If individuals received alarms from authorities they would have paid serious attention.
Public scrutiny has also fallen on the timing of warnings from the local meteorological services.
Some parts of Morin Dawa Daur that receive less than 490 millimeters of rainfall a year recorded 153 milliliters on Sunday alone, the most since records began, the official said.
Much of this work involves using investigative methods and forensic tools.
Over one third of that will come from hydropower—more than from any other source.
Dr Wang Weiluo Photo taken on July 19, 2020 shows floodwater being discharged from the Three Gorges Dam.