Flood victims look for shelter as a storm hits their encampment in Pakistan's Muzaffargarh district of Punjab province September 4, 2010. The flooding has destroyed cropland and livestock and displaced millions of people, causing damage the government has estimated at $43 billion, or almost one quarter of the South Asian nation's 2009 GDP. REUTERS/Damir Sagolj (PAKISTAN - Tags: DISASTER ENVIRONMENT IMAGES OF THE DAY)