Early estimates put the damage from Pakistan’s recent deadly floods at more than $10 billion, its planning minister said on Monday, adding the world has an obligation to help the South Asian nation cope with the effects of man-made climate change.

Unprecedented flash floods caused by historic monsoon rain have washed away roads, crops, infrastructure and bridges, killing at least 1,136  people in recent weeks and affecting more than 33 million, over 15% of the country’s 220 million population. The climate change minister has called the situation a “climate-induced humanitarian disaster of epic proportions.”