Qaplo - A stark warning has been sounded by NASA, highlighting the alarming rate at which sea levels are rising and threatening the very foundations of some of the world's most populous cities. The consequences of inaction will be catastrophic, leaving millions without homes and displacing countless more. Indonesia, a country already prone to natural disasters, is bearing the brunt of this crisis. Its capital city, Jakarta, is sinking at an alarming rate—17 centimeters per year—making it one of the fastest-sinking cities in the world. The low-lying geography and its history as a swampy area have exacerbated the problem, with 13 major rivers flowing into the Java Sea and putting nearly the entire city at risk of flooding and rising sea levels. The situation is not unique to Jakarta. Cities around the globe are facing similar threats. Miami, for example, sits precariously on the edge of the Atlantic, with its elevation barely above sea level. By 2060, approximately 60% of the city is expected to be at risk of submersion. Meanwhile, Lagos in Nigeria is experiencing land subsidence of more than 7.6 centimeters per year, with frequent flooding becoming a regular occurrence. Bangkok's coastline is retreating by more than one kilometer each year, and much of the city is projected to disappear within a century. Kolkata, India, experienced severe flooding in 2024 that displaced 250,000 people. Manila in the Philippines is sinking at a rate far above the global average due to groundwater extraction and mangrove destruction. The crisis extends beyond Asia. Alexandria in Egypt and Dhaka in Bangladesh are also confronting serious threats from rising seas. In Egypt, the Nile Delta region could be severely affected, with projections suggesting that 30% of Alexandria may be submerged. Yangon in Myanmar faces additional risks because of its proximity to the active Sagaing Fault, which increases the possibility of land subsidence triggered by earthquakes. So, what is driving this crisis? In short, climate change. The melting of polar ice caps and the thermal expansion of seawater are directly contributing to higher sea levels. As one scientific report noted, global warming is accelerating ice melt and the expansion of seawater, both of which intensify the rise in ocean levels. The economic consequences will be staggering. Trillions of dollars in damage are possible, as coastal flooding threatens infrastructure, businesses, and entire urban economies. Past disasters, such as the devastating 2007 flood in Jakarta that killed 80 people and displaced hundreds of thousands, offer a sobering preview of what may lie ahead. But this is not only an economic issue. It is a humanitarian crisis in the making. Hundreds of millions of people worldwide could lose their homes, forcing communities to relocate and fundamentally altering the social fabric of coastal regions. What can be done? The warning signs have been visible for decades, and cities like Jakarta stand as clear examples of the cost of delaying action. Indonesia's decision to relocate its capital to Nusantara Capital City (IKN), beginning in 2022, represents a significant and forward-looking response. Even so, relocation alone will not solve the problem. Cities around the world must act now by investing in sea walls, restoring natural coastal defenses, expanding green infrastructure, and adopting climate-resilient urban planning. The clock is ticking, but there is still time to change course. The cost of inaction will be immense. The benefits of decisive action, however, could save millions of lives and preserve the future of some of the world's most vital cities. Sources: NASA Sciencing Indonesian government reports
