From Spain to Greece, the European Mediterranean is experiencing a drought that is no longer exceptional but structural. Reservoirs in southern Iberia are at 35 % capacity, olive groves in Andalusia produce half of what they did five years ago, and in Sicily water rationing for agriculture has become a summer routine. What seemed like a passing climatic episode is consolidating into a new normal that reshapes the landscape, economy and political relations in the region.
Reservoirs in southern Spain and Greece have hit historic lows, with an average drop of 40 % compared to the previous decade.
A cycle that is breaking
The rainfall regime in the Mediterranean has changed. Precipitation is concentrated in increasingly violent but less frequent torrential storms, causing water to run off to the sea without recharging aquifers. Farmers, who for generations planned their harvests with predictable seasonal calendars, now face permanent uncertainty. In southern Portugal, corn crops have almost completely disappeared and many producers have switched to almonds, which are more drought-resistant, although their profitability depends on international prices.
The concept: structural water stress
Structural water stress occurs when water demand chronically exceeds renewable availability. In the Mediterranean, agriculture consumes up to 80 % of available water, so any reduction in rainfall has an immediate impact on production and ecosystems.
Political tensions and new agreements
Drought is not only affecting the countryside: it is rewriting the political geography of water. In Spain, the Tajo-Segura transfer, which carries water from the center to the southeast, generates clashes between autonomous communities. In Italy, the Lombardy region has proposed building new storage infrastructure, while the central government is pushing a drought law that allows intervention in the management of shared basins. The European Commission, for its part, has warned that Common Agricultural Policy funds must be linked to water-saving practices and climate-adapted crops.
Are technological solutions in sight?
Desalination and the reuse of treated water are two of the most mentioned tools. In southeastern Spain, desalination plants already cover up to 20 % of agricultural consumption in some areas, but their high energy cost limits expansion. There is also growing interest in soil moisture sensors and smart irrigation systems that adjust flow in real time. However, these technologies require investments that many small farmers cannot afford without public support. Artificial intelligence applied to drought prediction and distribution network optimization is beginning to be explored by basin agencies, but its implementation is still incipient.
What is at stake for the rest of the world
The European Mediterranean is just one example of a global phenomenon. Regions such as California, northern Chile, southern Australia or the Horn of Africa face similar dynamics. Water management is shaping up to be one of the great geopolitical challenges of the 21st century, where scarcity not only affects food production but can exacerbate border tensions and forced migration. What happens in the coming years in southern Europe will serve as a laboratory for strategies that other regions will have to adopt.