Complete the following sentence: Natural disasters are a big problem in China. China had six of the world's top 10 deadliest natural disasters; including the top three: the
1931 China floods, death toll 3 million to 4 million, 1887 Yellow River flood, death toll 0.9 million to 2 million, and the 1556 Shaanxi earthquake, death toll 0.83 million.<unk>1931 China floods, death toll 3 million to 4 million, 1887 Yellow River flood, death toll 0.9 million to 2 million, and the 1556 Shaanxi earthquake, death toll 0.83 million.