I think if you check media reports from China floods of the 1930s and 1940s...there various occassions that 100k people died. Nobody activately talked about it...but most foreigners in the country during this period readily agreed on extremely high numbers.
The Tangshan earthquake in 1976 (China) killed somewhere between 250-650 THOUSAND people. The exact deathtoll is unknown cuz, well, they're commie China..