The flood was originated mostly because of rainfall and observed the highest ever recorded monsoon rain in Sindh started from Aug 11, 2011 to Sept 14, 2011. So the inundated area increased respectively with rainfall and ceased on Sept 15, 2011
effectively with the stop of rainfall. After Sept 15, 2011 the inundated area was reduced with the rate of 167 km2/day.
The floods caused considerable damage; an estimated 434 civilians were killed, with 5.3 million people and 1,524,773 homes affected. Sindh is a fertile region and often called the "breadbasket" of the country; the damage and toll of the floods on the local agrarian economy was extensive. At least 1.7 million acres of arable land was inundated as a result of the flooding. The flooding followed the previous year's historic 2010 Pakistan floods, which devastated the entire country. Unprecedented torrential monsoon rains caused severe flooding in 16 districts of Sindh province.