During the heavy rainfall event in Beijing, data from more than 100 automatic meteorological stations in the city were interrupted because of power or station problems, according to the China Meteorological Administration. It added satellite information and radar detection was used to determine precipitation.
Shao Sun, a climatologist at the University of California, Irvine, said it was the most intense rainfall event northern China had experienced since 1964, surpassing the 2012 flooding that killed 79 people and affected more than 1.6 million.