It's as clear as crystal,
in 1948 India ceased the flow of water into Pakistan for a month.
India has now made tons of dams in Pakistani rivers which can give them an edge to manipulate the flow of water towards Pakistan. And few years ago india opened its all dams which caused massive flood in Pakistan. And now india has done the same.
If this goes on then I'm afraid that in near future the world will witness the bloody nuclear war. A war which will be fight over water. And A war which will end the story of Pakistan and india for ever.