Why Bihar faces flood every year?

Close to half a million people in nearly a dozen districts in Bihar have been affected by the flood that has cut a swathe of destruction across the northern parts of the state, the disaster management department said on Wednesday. Life was affected in large parts of Sitamarhi, Sheohar, Supaul, Kishanganj, Darbhanga, Muzaffarpur, Gopalganj, East Champaran, West Champaran and Khagaria districts due to the flood. Watch video.