It is not uncommon for zuds to kill over 1 million head of livestock in a winter. The 1944 record of almost 7 million head of livestock lost was shattered in the 21st century. Of note, the arctic oscillation in both 1944-45 and in 2010 was pushed much deeper into Central Asia bringing prolonged extreme cold weather. In 1999/2000, 2000/2001 and 2001/2002, Mongolia was hit by three zuds in a row, in which a combined number of 11 million animals were lost.