6. Floods

S1, E6: 1931 and the Huai river in China peaks at 53 feet above normal killing 200,000 in a single night as they sleep, in total as many as 4 million die in this disaster. 1999 and the state of Vargas in Venezuela is brought to a standstill as torrential rains triggers a mudslide that buries towns under 3 meters of mud, sweeps whole communities into the sea, and kills an estimated 50,000 people.