Rubuta ci gaba don wannan sakin layi - Ban da yunwa da annoba, wasu daga cikin munanan bala'o'i a tarihi (wanda aka auna ta hanyar mutuwar) sun kasance ambaliyar kogin, musamman a Kogin Yellow a China <unk> duba jerin ambaliyar ruwa mafi muni. Mafi muni daga cikin wadannan, kuma mafi munin bala'i na halitta (ban da yunwa da annoba) sune ambaliyar ruwan China ta 1931
, an kiyasta cewa sun kashe miliyoyin. Wannan ya riga ya faru da ambaliyar Ruwa Yellow ta 1887, wanda ya kashe kusan mutane miliyan, kuma shine bala'i na biyu mafi muni a tarihi.