January 2010 Rio de Janeiro floods and mudslides Rio de Janeiro had its worst ever flood that killed over 250 people in April 2010. 2010 northeastern Brazil floods Between June 2010 and August 2010, flooding in China affected more than 230 million people – with 15.2 million people evacuated and thousands dead. On 26 July 2010, heavy monsoon rains flooded most of Pakistan in the 2010 Pakistan floods.