Although fighting disrupted aid delivery in some areas, a scaling up of relief operations in mid-November had unexpectedly significantly reduced malnutrition and mortality rates in southern Somalia, prompting the UN to downgrade the humanitarian situation in the Bay, Bakool and Lower Shabele regions from famine to emergency levels. According to the Lutheran World Federation, military activities in the country's southern conflict zones had also by early December 2011 greatly reduced the movement of migrants. By February 2012, several thousand people had also begun returning to their homes and farms. In addition, humanitarian access to rebel-controlled areas had improved and rainfall had surpassed expectations, improving the prospects of a good harvest in early 2012.