“The frequency of natural disasters has increased by 42 percent since the 1980s, and the percentage of those that are climate-related has risen from 50 to 82 percent. The United Nations Office for the Coordination of Humanitarian Affairs and the Internal Displacement Monitoring Centre estimates that in 2008, climate-related calamities drove 20 million people from their homes—more than four times the number displaced by violent conflict.”
- Scientific American, Casualties of climate change.If the floods in Pakistan were related to climate change, then there is twenty million displaced in a single country in 2010, before we've considered anywhere else in the wettest year on record. The whole article is worth reading. Interestingly, it starts by pointing out that the patriarch Jacob/Israel was a refugee, moving his family to Egypt due to drought (Genesis 42-47).