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A rapid expansion of data‑centres around Santiago’s Quilicura wetland is siphoning billions of litres of water, turning one of Chile’s largest swamps into a dry plain and intensifying a 15‑year mega‑drought. The Wetland’s Vanishing: On‑the‑Ground Observations in Quilicura Rodrigo Vallejos, a final‑year law student, first noticed the change five years ago when the once‑lush Quilicura wetland – spanning 468.4 hectares (about 1,200 acres) – began to dry out. He now works with the activist group Resistencia Socioambiental de Quilicura, documenting how the area, once a key urban biodiversity zone, is turning into “a wetland without water.” Water Consumption Numbers: Billions of Litres Drained Annually Experts estimate that the largest data‑centres in the district – operated by Google, Microsoft, Brazilian Ascenty and Chilean Sonda – consume roughly 1.5 bn litres of water each year. The scale is illustrated by the following figures: 33 data‑centres are currently operating, with 34 more planned. Google’s water rights allow extraction of up to 50 litres per second, equivalent to the annual use of 8,500 Chilean households. Water‑based cooling systems dominate, using far more water than air‑cooled alternatives. Ecological and Social Fallout: Why Chile’s Tech Push Risks a Mega‑Drought Crisis The water draw aggravates a national mega‑drought that has persisted for over 15 years. Climate scientist Pablo Sarricolea warns that by 2070 precipitation could fall sharply while average temperatures rise from 15.6 °C to 17.4 °C, increasing evaporation and further stressing water supplies. Residents also point to limited job creation and the lack of transparent reporting on water extraction. Company statements differ: Microsoft claims its Chilean sites rely on air‑based cooling, reducing water use, while Ascenty argues its water consumption equals that of only 16 households. Nonetheless, activists argue that prioritising water for tech firms over local communities raises ethical concerns. Looking Ahead: Relocation, Regulation, and the Future of Chile’s Data‑Centre Strategy Chile’s national data‑centre plan, launched under former President Gabriel Boric, aims to position the country as Latin America’s tech hub. Experts suggest a shift to water‑rich southern regions to balance growth with ecological limits. Stronger industry regulation, transparent water‑use reporting, and investment in air‑cooled or renewable‑energy‑based cooling could mitigate the crisis. Without such measures, the Quilicura wetland may become a stark symbol of how unchecked digital infrastructure can deepen climate vulnerability in already water‑scarce regions.

The Global Significance of the Fitzroy RiverThe Martuwarra Fitzroy River, which flows 700km through the Kimberley to King Sound, is considered the last stronghold for sawfish globally and is home to four of the world's five species. This untamed river ecosystem supports largetooth, dwarf, green and narrow sawfish, all protected under national environment laws. The river, its estuary and near-shore marine environment provide a critical habitat that represents what a relatively untouched sawfish population looks like on a global scale.The Water Extraction PlanA Western Australian government proposal aims to increase groundwater allocation from about 32GL to 75.7GL in the Fitzroy River catchment. While the draft water plan, now out for consultation, has proposed no additional surface water allocations and no dams on the river, environmental groups are particularly concerned about the increased groundwater extraction. The underground water stores feed several large pools and wetlands that act as crucial refuges for sawfish and other species during long dry periods.The Ecological ImpactEndangered largetooth sawfish, the largest and most imperilled species, are born at the river's mouth and spend several years inhabiting the river, its tributaries and deep aquifer-fed pools before heading out to sea. Adults can reach up to seven metres in size. Conservationists warn that sawfish won't survive without these refuge pools, which also provide life support for barramundi, a whole range of other fish, freshwater prawns and big trees and vegetation that sustain birds, possums, bats and insects.The Indigenous PerspectiveDr Anne Poelina, executive chair of the Martuwarra Fitzroy River Council, an alliance of elders and young leaders from traditional owners of the catchment, emphasized that water is precious and a life force. She stated that the lived experience of Aboriginal people on country is that the river is already stressed, and continued decline will affect people's lives and livelihoods as well as the environment, including access to clean drinking water and the rising cost of living. Poelina called for more time to gather information before any additional licences are granted.The Scientific ConcernDr Leonardo Guida from the Australian Marine Conservation Society described sawfish as "probably one of the most unique looking animals on the planet." Martin Pritchard from Environs Kimberley noted that the underground water stores that feed refuge pools are "absolutely critical in a landscape that's so hot and dry." Dr Ryan Vogwill, a hydrogeologist, explained that groundwater plays an "incredibly important" role supporting the high biodiversity and cultural values of the river ecosystem during dry periods when surface water isn't flowing.Future OutlookThe WA government's draft water plan requires applicants seeking a licence to demonstrate "sustainable groundwater use" and "protect water-dependent ecosystems and sites of ecological, cultural and social significance." However, conservationists remain concerned about the potential impacts, especially given the failure of a similar water allocation plan in the Pilbara where groundwater aquifers are in decline. The Fitzroy River has national and Aboriginal heritage list status for its outstanding cultural and natural values, making its protection a matter of significant environmental and cultural importance.

Mexico City’s Accelerating Sinking Captured by NISARThe historic heart of Mexico City is visibly tilting, but the full scale of the problem is now visible from space. NASA and the Indian Space Research Organisation’s NISAR satellite are delivering week‑by‑week radar maps that quantify how quickly the metropolis is descending.NISAR Satellite Maps Real‑Time Subsidence Across the MetropolisUsing synthetic‑aperture radar, NISAR penetrates clouds and vegetation to detect millimetre‑scale ground movement. Marin Govorčin, a scientist at NASA’s Jet Propulsion Laboratory, says the mission “takes radar imaging observations of Earth to the next level.”Continuous monitoring from October 2025 to January 2026.Coverage includes central plazas, peripheral suburbs and previously hard‑to‑study terrain.Data is openly available for researchers worldwide.Subsidence Rates Surpass 2 cm per Month in Critical ZonesAnalysis shows that several hotspots—most notably the main airport and the Angel of Independence monument—are sinking at rates exceeding 2 cm per month, one of the fastest recorded globally.Angel of Independence: 14 steps added to its base since 1910.Airport runway deformation threatens flight safety.Dark‑blue zones on the NISAR map indicate >2 cm/month subsidence.Infrastructure and Urban Planning Under ThreatGroundwater extraction, which exceeds natural recharge, is the primary driver. Engineers at the National Autonomous University of Mexico (UNAM) warn of cascading impacts:Tilting historic buildings and warping roads.Damage to the underground metro and water‑distribution pipes.Increased flood risk as the city’s elevation drops.Darío Solano‑Rojas notes that the technology “opens up possibilities for studying volcanoes, earthquakes and landslides” beyond subsidence.Future Monitoring and Mitigation OutlookProject manager David Bekaert expects a surge of discoveries as NISAR data become integrated into city‑scale models. Recommendations include:Reducing groundwater pumping and enhancing artificial recharge.Incorporating real‑time subsidence data into building codes.Expanding radar monitoring to other at‑risk megacities.The NISAR mission demonstrates how space‑based sensors can turn a local crisis into a global research platform, offering early‑warning capabilities for a range of Earth‑surface hazards.