In July 2011, due to a drought in Eastern Africa, over 1,000 people per day were arriving in need of assistance. The influx reportedly placed great strain on the resources, as the capacity of the camps was around 90,000, whereas the camps hosted 439,000 refugees in July 2011 according to the UNHCR. The number was predicted to increase to 500,000 by the end of 2011 according to estimates from Médecins Sans Frontières. Those population figures at the time made Dadaab the largest refugee camp in the world. According to the Lutheran World Federation, military operations in the conflict zones of southern Somalia and a scaling up of relief operations had by early December 2011 greatly reduced the movement of migrants into Dadaab.