The 2010 Pakistan floods began in late July 2010 , resulting from heavy monsoon rains in the Khyber Pakhtunkhwa , Sindh , Pakistani Punjab and Balochistan regions of Pakistan and affected the Indus River basin . The 2010 Pakistan floods began in late July 2010 , resulting from heavy monsoon rains in the Khyber Pakhtunkhwa , Sindh , Punjab and Balochistan regions of Pakistan and affected the Indus River basin .