A new index aims to change how the world prepares for drought

Drought does not arrive with sirens. It builds quietly—through drying soils, shrinking water supplies and wilting crops—until its impacts ripple across farms, cities and entire economies. By the time it is fully visible, the damage is often already widespread and costly, affecting everything from food and energy production to transportation and health.

With droughts projected to affect three in four people worldwide by 2050, and three quarters of the world’s land already permanently drier due to unsustainable land management and climate change, how should countries act to prevent drought from escalating into crisis?

Much like the Human Development Index reshaped how countries understand progress, the new Drought Resilience Index aims to provide a clear, shared benchmark to help governments manage drought risk and prevent irreversible impacts—including lost lives and shattered livelihoods.

Now under development through the United Nations Convention to Combat Desertification (UNCCD), the International Drought Resilience Alliance (IDRA) and partners, the index is designed to give decision-makers a clearer picture of where vulnerabilities lie —helping them assess preparedness, create policies and act before drought turns into disaster.

A three-day  workshop recently hosted by the European Commission Joint Research Centre in Italy brought together a wide range of international partners—spanning multilateral, scientific, academic, technical, and government institutions—to fine-tune the tool, which is expected to launch as part of a broader AI-powered data visualization platform.

We spoke with Edgar Gutiérrez-Espeleta, senior policy consultant at UNCCD advising on the development of the tool, to understand how the Drought Resilience Index works—and why it could reshape how countries prepare for a new drought era. 

From data overload to clarity

The Drought Resilience Index, part of the broader International Drought Resilience Observatory (IDRO), is designed to turn complex and fragmented data into simple scores that policymakers can use to make decisions. 

“Drought is one thing. Resilience to drought is another,” says Gutiérrez-Espeleta.  “The aim is to help countries assess their capacity to anticipate, prepare for and adapt to drought, and to highlight where action is most needed so they can use limited resources effectively.”

To capture this, the Drought Resilience Index is built around three dimensions: anticipation, preparation and adaptation. These reflect the full lifecycle of drought risk. 

Each dimension is assessed across four areas that shape resilience: the built environment; the natural environment, including soils, forests and wetlands; communities; and the economy —together offering a multidimensional picture of how well countries manage drought risk.

Across each of these areas, experts identify one or two indicators to capture the most critical aspects of resilience, drawing on available, UN-vetted global datasets. These indicators are then standardised and combined into a composite score, enabling countries to assess their capacity to manage drought risk.

For example, in anticipation, the health of ecosystems—such as forest cover or watershed integrity—can indicate how well the natural environment buffers drought impacts. In preparation, the efficiency and reach of water supply systems reflect the capacity of the built environment to conserve and distribute scarce resources. In adaptation, the share of livelihoods diversified beyond water-intensive activities shows how well the economy can withstand recurring drought conditions.

“Low scores act as warning signals, pointing decision-makers to areas that require urgent attention,” explains Gutiérrez-Espeleta.

Built through collaboration

The index is not being developed in isolation. It builds on years of work within the UNCCD’s Science-Policy Interface and has been shaped through consultations with top drought resilience experts from different regions, including the European Union’s Joint Research Centre, the US National Drought Monitor, the World Meteorological Organization and Yale Center for Ecosystems and Architecture.

In the lead up to the 17th session of the Conference of the Parties to the UNCCD (UNCCD COP17), specialists are refining the selection of indicators, assessing available datasets and ensuring that the index is both scientifically robust and practical for policymakers.

One of the key challenges is data availability. Not all countries have the same level of information, and some indicators may only exist for some parts of the world.

“We are starting with the best data currently available and building from there,” Gutiérrez-Espeleta says. “As the index evolves, it will also help drive stronger and more comprehensive data collection, as has been the case with the Human Development Index.”

A tool shaped by experience

The idea for the Drought Resilience Index is rooted in experience. In 2015, as Costa Rica’s Minister of Environment, Gutiérrez-Espeleta faced a severe drought that demanded urgent, cross-sector decisions—but without a clear overview, it was difficult to prioritize action. 

That gap is what the Index is designed to fill. By bringing diverse data into a single framework that everybody can understand, it helps policymakers identify where systems are weakest and where action is most needed—offering, in his words, “a way to quickly see the big picture.”

Rather than prescribing solutions, the Index works as a signal, highlighting where problems are most acute and pointing decision-makers towards the areas that require attention.

The ambition is simple. When ministers see it at COP17, Gutiérrez-Espeleta hopes their reaction will be immediate: “This is what we needed.” 

From there, governments can mobilize resources and act—because while drought cannot be prevented, the vulnerability of people, economies and ecosystems can be greatly reduced.

Photo : Participants at the IDRO Drought Resilience Index workshop hosted in Italy by the European Commission Joint Research Centre, including representatives of: Yale Center for Ecosystems and Architecture, National Center for Meteorology of the Kingdom of Saudi Arabia, World Meteorological Organization, United Nations Environment Programme, United Nations University Institute for Water, Environment and Health, Global Water Partnership, US National Drought Mitigation Center, NASA Goddard Space Flight Center, CIMA Research Foundation, Sahara and Sahel Observatory, CSIC-CEBAS, Ministry of Ecological Transition and Demographic Challenge of Spain, Ministry of Environment and Sustainable Development of Senegal, Center for Hydrometeorology and Remote Sensing, UK Centre for Ecology & Hydrology, Deltares, International Rice Research Institute,  IGAD Climate Prediction and Applications Centre, University of Southern Queensland, UNEP-DHI Partnership, Tree Aid.