Mexico City is experiencing alarming subsidence, sinking at a rate of over 2 cm per month, primarily due to the excessive extraction of groundwater from its ancient lake bed. NASA's NISAR satellite, a collaboration with the Indian Space Research Organization, is now tracking this phenomenon in real time, providing detailed insights into the extent and impact of the sinking. The satellite can detect minute changes in Earth's surface, allowing for better understanding of urban infrastructure challenges and potential climate impacts. The city, home to approximately 22 million people, faces significant risks as its infrastructure deteriorates, including tilting buildings and damaged water distribution systems. The underground aquifer, which supplies about half of the city's water, is shrinking at an alarming rate of 40 cm per year, leading to a vicious cycle of water loss and infrastructure damage. Experts suggest that while NISAR's imagery will raise awareness of the issue, effectively halting the sinking will require difficult decisions about water extraction practices.