August 8
edit1899: The "San Ciriaco hurricane" began crossing the island of Puerto Rico, eventually killing more than 3,000 people. The storm had an accumulated cyclone energy of 73.57, the highest on record in the Atlantic basin.
1975: Flooding rains due to Typhoon Nina caused the Banqiao Dam in China's Henan Province to fail. The subsequent catastrophic flooding, famine, and diseases would kill as many as 200,000 people.
2010: Heavy rain and flooding led to catastrophic mudslides which killed more than 1,400 people in Zhugqu County, Gannan Tibetan Autonomous Prefecture, China. This was part of a larger series of floods and mudslides which killed more than 3,000 people across southern and central China over the summer.