In this lecture, we confront the pressing challenges posed by climate change in river basins engaged in intensive agriculture. Highlighting the Indus basin, we examine the expected intensification of the hydrological cycle, leading to severe floods and droughts, alongside the critical reduction in river flows due to diminishing snow and glacier reserves. This lecture navigates the complex terrain of demand management and technological adaptation, while critically addressing the concept of water justice. It questions who bears the responsibility for climate-induced changes, especially when external actors are involved. Delving into the notion of justice, we explore its definitions and implications from an Islamic perspective, offering a unique lens to understand water justice in regions with significant Muslim populations. This discussion not only addresses environmental and technological challenges but also engages with the deeper ethical considerations of equity and responsibility in the face of global climate change.