Mexico City Sinking Nearly a Foot Annually, NASA Satellite Data Reveals

Key facts

• Mexico City sinks at an average rate of 9.5 inches (24 cm) per year.
• NASA's NISAR satellite measured subsidence between October 2025 and January 2026.
• The city has dropped more than 39 feet (12 meters) in less than a century.
• Some areas sink at 0.78 inches (2 cm) per month, including the main airport and the Angel of Independence.
• The metropolitan area spans 3,000 square miles (7,800 sq km) with 22 million residents.
• The Metropolitan Cathedral, begun in 1573, is visibly tilted due to subsidence.
• Groundwater pumping and urban development have shrunk the aquifer, causing sinking for over a century.

A City Sinking Into Its Past

Mexico City is sinking by nearly 10 inches (25 centimeters) a year, a rate so rapid that the subsidence is visible from space, according to new satellite imagery released this week by NASA. The phenomenon makes the Mexican capital one of the fastest-subsiding metropolises on the planet, threatening critical infrastructure and deepening a chronic water crisis. Built atop an ancient lake bed, the sprawling urban area — covering 3,000 square miles (7,800 square kilometers) and home to some 22 million people — has been slowly descending for more than a century. What was once a network of canals is now a landscape of sinking streets and tilting monuments.

NASA’s NISAR Satellite Captures the Scale

The new estimates are based on measurements taken between October 2025 and January 2026 by NISAR, a powerful satellite jointly operated by NASA and the Indian Space Research Organization. NISAR tracks real-time changes on the Earth’s surface, providing unprecedented detail on the city’s deformation. “It’s basically documentation of all of these changes within a city,” said Paul Rosen, a NISAR scientist. “You can see the full magnitude of the problem.” The satellite data reveal that in some parts of the city, the ground is sinking at an average rate of 0.78 inches (2 centimeters) a month — including at the main airport and the iconic Angel of Independence monument.

Groundwater Pumping Drives the Crisis

Extensive groundwater extraction and urban development have dramatically shrunk the aquifer beneath Mexico City, causing the land to compact and subside. The contracting aquifer has also exacerbated a water crisis that is only expected to worsen, as the city struggles to meet the demands of its growing population. “It damages part of the critical infrastructure of Mexico City, such as the subway, the drainage system, the water, the potable water system, housing and streets,” said Enrique Cabral, a geophysics researcher at the National Autonomous University of Mexico. Over less than a century, the cumulative drop has exceeded 39 feet (12 meters).

Historic Monuments Bear the Brunt

The subsidence has left many of the city’s historic buildings visibly tilted, including the Metropolitan Cathedral, where construction began in 1573. The cathedral, along with other colonial-era structures, now leans at precarious angles, a testament to the ground’s instability. Many downtown streets were once canals, a tradition that continues in the rural fringes. But the relentless sinking has turned these areas into zones of chronic risk, where infrastructure failures are becoming more frequent.

A Global Benchmark for Subsidence

“We have one of the fastest velocities of land subsidence in the whole world,” underscores that Mexico City’s sinking is not just a local problem but a global benchmark for understanding how human activity can reshape urban environments. The satellite data, by capturing details of the Earth from space, are “telling us something about what’s actually happening below the surface,” Rosen added. The findings highlight the urgent need for sustainable water management and urban planning to mitigate further damage.

What Lies Ahead for a Sinking Capital

The water crisis and subsidence are expected to intensify as climate change reduces rainfall and population growth increases demand. Without intervention, the city’s infrastructure — already under strain — could face catastrophic failures, displacing millions. The NISAR data provide a baseline for monitoring future changes, but reversing the trend will require a fundamental shift in how the city manages its water resources. For now, Mexico City continues to sink, its fate written in the ancient lake bed on which it was built.

The bottom line

• Mexico City sinks nearly a foot per year, one of the fastest rates globally, driven by groundwater extraction.
• NASA’s NISAR satellite, a joint project with India, provided the precise measurements between Oct 2025 and Jan 2026.
• The city has dropped over 39 feet (12 meters) in less than a century, damaging infrastructure and historic buildings.
• The Metropolitan Cathedral and other landmarks are visibly tilted due to subsidence.
• The shrinking aquifer worsens a water crisis that threatens 22 million residents.
• Sustainable water management is critical to slowing the sinking and preventing future disasters.