Water, a resource taken for granted for centuries, has become the epicenter of a new geopolitics. In 2026, extreme droughts and the management of shared basins are redefining alliances, tensions and economies in regions from the Mediterranean to the Horn of Africa. This is not just a climate crisis: it is a power realignment.
More than 2 billion people today live in countries with high water stress, and global demand for fresh water is estimated to exceed supply by 40% by 2030.
The Mediterranean: a laboratory of tensions
In the Mediterranean basin, the drought that began in 2024 has intensified. Spain, Italy and Greece have seen their water reserves drop to critical levels, while North African countries such as Morocco and Algeria face urban and agricultural supply restrictions. The management of transboundary rivers, such as the Ebro or the Po, has become a source of dispute between regions and countries, and existing bilateral agreements are showing cracks under demand pressure.
Water stress
It occurs when water demand exceeds the amount available in a given period. It affects agriculture, industry, human consumption and energy generation, and is a growing driver of migration and conflict.
The Nile and the Horn of Africa: the countdown
In northeastern Africa, the dispute over the Nile's flow between Ethiopia, Sudan and Egypt remains unresolved. The Grand Ethiopian Renaissance Dam, operational since 2023, has altered the river's historical flow, and recurrent droughts worsen uncertainty. Meanwhile, in the Horn of Africa, millions depend on the rainy season for survival, and lack of rainfall has led to lost harvests and mass displacement to cities.
The response: desalination, reuse and agreements
Faced with this reality, governments are accelerating investments in desalination plants, wastewater reuse systems and smart irrigation technologies. Israel, Australia and Singapore are benchmarks in water management, but for most countries the cost remains prohibitive. At the same time, international organizations such as the UN and the World Bank are promoting cooperation frameworks for shared basins, although progress is slow and often clashes with national interests.
What does this mean for the world?
Water scarcity is not a future problem: it is the present that is already reshaping the map of security, economy and migration. Extreme droughts, overexploitation of aquifers and pollution of freshwater sources are accelerating trends. Understanding water as a strategic resource, not just a common good, is the first step to preventing the next water crises from turning into open conflicts. Water management will likely be the great test of international cooperation in the coming decades.