How satellite tracking is reshaping drought monitoring across Mexico’s regions

A new OECD study using satellite data reveals a persistent north–south divide in Mexico’s drought patterns, with northern regions facing chronic water stress while the south remains relatively better off but increasingly vulnerable. The research highlights how high-resolution, real-time monitoring can help governments better anticipate drought impacts and design targeted policies to manage growing climate risks.

A new OECD study is shedding light on one of Mexico’s most urgent climate challenges: drought. Backed by institutions such as the OECD, NASA, the United States Geological Survey and Mexico’s National Water Commission, the research offers a clearer and more detailed view of how water stress is spreading across the country.

Drought is no longer just an environmental issue. It is an economic one. It disrupts farming, reduces energy production, raises food prices and puts pressure on government budgets. In Mexico, the risks are especially high because agriculture and electricity generation together consume most of the country’s water. With rainfall declining and aquifers already under strain, the need to monitor drought more effectively has become critical.

How Satellites Are Changing the Way We Track Drought

What makes this study different is the way drought is measured. Instead of relying only on weather stations, which can be limited and slow, researchers used satellite images to track vegetation and surface moisture across the entire country.

This method shows how the land itself reacts to water shortages. If plants are stressed and soil moisture drops, it signals drought conditions even before traditional data might capture it. The result is a faster, more accurate and more detailed way of understanding drought in near real time.

This approach also allows experts to map drought at a very fine scale, revealing patterns that were previously hidden.

A Country Divided by Water Stress

The findings show a clear pattern. Mexico is split into two very different drought zones.

The north and north-central regions, including states like Chihuahua, Sonora and Baja California, face frequent and severe drought. These areas are naturally dry and remain highly vulnerable year after year.

In contrast, the south and southeast, including states such as Tabasco and Chiapas, receive more rainfall and generally have healthier vegetation and more water availability.

But the divide is not just regional. Even within a single state, drought conditions can vary sharply. In Querétaro, for example, some areas experience extreme drought while nearby areas face little or none. This shows that drought is not uniform and that local conditions matter a lot.

The Hidden Economic Impact

Drought does not affect all regions equally. Many of the hardest-hit areas are also among the least economically developed. These regions depend heavily on farming and other water-intensive activities, making them more vulnerable when water becomes scarce.

They also have fewer financial resources to respond to shocks. This means drought can deepen existing inequalities, forcing people to migrate or disrupting local economies. Even though these regions may contribute less to national GDP, the effects of drought can still ripple across the country through supply chains and rising prices.

There is also a growing concern for southern regions. While they currently have more water, they also lose more of it through evaporation due to higher temperatures. As climate change pushes temperatures higher, even these wetter areas could face increased water stress in the future.

What the Past and Future Reveal

Looking at trends over the past two decades, the study finds that drought severity has slightly improved compared to the early 2000s. However, this does not mean the problem is going away. The same regions remain vulnerable, showing that drought risk is deeply linked to geography and climate.

Drought also changes with the seasons. It is usually more intense in spring and eases later in the year when the rains arrive. Some years bring widespread drought, while others see more localised but severe conditions.

The study also introduces the idea of “nowcasting,” using recent satellite data to estimate current drought conditions. Early results for 2025 suggest that overall patterns remain similar, but some states are improving while others are worsening. This kind of early insight can help governments act faster and prepare better.

A Tool for Smarter Policy

The message from the research is clear. Better data leads to better decisions. Satellite monitoring can help governments detect drought early, respond quickly and focus support where it is needed most.

But technology alone is not enough. Strong coordination between climate, water and financial authorities is essential to manage risks effectively.

As climate change continues to raise temperatures and strain water resources, drought will remain a major challenge for Mexico. Understanding it in detail is the first step toward building resilience and protecting both people and the economy.