Like in the 1950s, the word ‘riparian’ is back again in the India–Pakistan lexicon, becoming this time intensely political, emotional and divisive. This development is both instructive and unsettling. It is instructive to note how the current water realties of the two countries, which have changed significantly since the Indus Water Treaty (IWT) in 1960, will now determine the treaty’s future. With growing populations, inadequate water management techniques and the impact of global warming, water resources are under pressure.