Drought trends in Murcia and the Spanish southeast
The Segura basin already runs at 121% of natural recharge. What the next two decades look like — and what residents are actually experiencing.
The Segura basin is one of the most overdrafted in Europe. If you want to understand what structural water stress looks like — not as a forecast, but as a lived condition — Murcia is the place to look.
The 121% number
When water managers say a basin is "stressed," they usually mean withdrawal exceeds 0.7 of natural recharge. Segura passed 1.0 — meaning more water leaves than enters — in the early 2000s. The 2025 measurement was 1.21.
The gap is filled three ways: groundwater drawdown (unsustainable, but fast), interbasin transfers from the Tajo (politically contested, declining), and desalination (energy-intensive but growing). Each has limits, and the basin's growth curve assumes all three keep working.
What residents are already seeing
Outdoor watering restrictions have applied four of the last six summers. Pool refilling now requires a permit in many municipalities. Agricultural users — the dominant withdrawal — face quota negotiations every year.
Tap pressure has dipped during peak summer in some neighbourhoods, particularly newer developments at the basin's edges. The water itself is increasingly mineralised due to higher reliance on desalination.
The 2030–2050 picture
Even in a low climate scenario, Segura's deficit grows. The Tajo–Segura transfer is on a long-term decline. Desalination scales up but its energy footprint constrains how fast.
The realistic 2050 picture: structural restrictions become permanent rather than seasonal, agriculture contracts to higher-value crops only, and the cost of water for new developments approximately doubles.
What adaptation looks like in practice
The Segura basin has no shortfall of attention from water managers. Spain's National Hydrological Plan has identified the Levante as the country's most critical water stress zone, and infrastructure responses are underway: the Torrevieja and Guadalentín desalination plants have been expanded, and new capacity at Águilas and San Pedro del Pinatar is in commissioning. These are genuine responses to a genuine problem.
But the harder adaptation is cultural and agricultural. The Huerta de Murcia — Europe's most intensive irrigated farmland — uses approximately 90% of all water withdrawn from the Segura. Regulatory reform is shifting allocation toward higher-value crops and away from water-intensive cereals. This is slow, contested, and essential. The basin's water future depends less on building more infrastructure and more on changing what flows through the infrastructure already there.