Earth is already known as the blue planet, with 70% of its surface covered by oceans. But what if the remaining 30% of land suddenly disappeared? The consequences would be catastrophic. Humanity, as we know it, relies on land for survival. A complete submersion would challenge every aspect of life from cities and ecosystems to the very survival of our species.Day 1: The Ice MeltsThe crisis would begin with extreme heat waves, raging wildfires, and violent storms. These conditions would trigger the rapid melting of Earth’s ice. Though today’s ice covers only 10% of land, it is enough to raise sea levels by 70 meters (230 feet) if it melted completely. Coastal cities such as New York, Miami, Tokyo, Lagos, and Rio de Janeiro would disappear underwater. Iconic locations like London, Paris, Venice, the Maldives, and the Bahamas would vanish entirely.Evacuation efforts would fail to keep pace with the flooding. Even the wealthiest nations attempting to build artificial islands would find the task nearly impossible. In the end, one third of the human population could be wiped out almost immediately.Day 2: Chaos on LandSurvivors would face widespread panic. Food, water, and medical supplies would become scarce, leading to violent conflicts. Roads would be clogged as people tried to flee inland. Power grids would fail, leaving millions cold, hungry, and terrified. With survival instincts kicking in, communities would break down, and basic infrastructure would collapse.Hospitals and emergency services would be overwhelmed, and communication networks would fail, isolating survivors from vital information. Looting and clashes over remaining resources would become widespread, forcing people to form small, self sufficient groups to increase their chances of survival. Entire neighborhoods could turn into ghost towns almost overnight, leaving a haunting landscape of abandoned cities.Governments and aid organizations would struggle to coordinate relief efforts, and local law enforcement would be unable to maintain order in the chaos. The psychological toll would be enormous, with widespread trauma shaping a new reality of fear and mistrust among survivors.Day 5: The Volcano AwakeningOver a million underwater volcanoes lie dormant beneath the oceans. The sudden melting of ice and extreme heat could trigger these volcanoes to erupt simultaneously. The result? Magnitude eight earthquakes across every continent, collapsing buildings and burying millions. Water trapped in the Earth’s mantle, potentially double the volume of all surface oceans, would be released, accelerating the rise of sea levels even further.Day 6: Tsunamis and Further FloodingMassive tsunamis would sweep across the already devastated continents. Evacuation zones would turn into scenes of mass panic, and no one could outrun the waves. The combination of tsunamis and mantle released water would ensure that nearly all remaining land was submerged.Ports, harbors, and coastal infrastructure would be obliterated, leaving survivors without safe evacuation routes. Entire river systems could reverse or overflow, flooding inland regions that had initially escaped the rising seas. The speed and magnitude of the flooding would leave almost no time for organized rescue operations, compounding the human tragedy. Survivors clinging to boats or floating debris would face starvation and exposure, while violent currents would destroy what little shelters remained. The relentless force of water would reshape the coastline and erase any landmarks once familiar to humanity.Day 7: A Planet of WaterBy the end of the first week, every continent would be underwater, leaving only the tallest mountain peaks visible. Earth would have officially become a waterworld.Small pockets of survivors clinging to mountaintops or floating debris would face constant exposure to the elements. Storms and relentless rainfall would make life precarious, and any attempts at rebuilding would be nearly impossible. Humanity would realize that adaptation to a fully submerged planet would require new ways of thinking about shelter, food, and community survival.The psychological impact of losing every familiar landscape would be profound, leaving survivors struggling to retain hope. Marine predators could also pose new threats as humans were forced into open water.Day 30: A New GovernmentIn the months that follow, surviving governments would attempt to establish order, declaring martial law in the few remaining mountain ranges. Long term planning would focus on constructing underwater living units. However, building these habitats would be a slow process requiring global collaboration, leaving most people to fend for themselves on floating rafts and temporary shelters. Day 60: Mass ExtinctionWith all land submerged, plants and land animals would perish. Forests, grasslands, and deserts would be gone, triggering the largest extinction event in 66 million years. Even marine life would be threatened as ocean chemistry shifts, turning waters more acidic and deadly for shell forming organisms. The food chain would collapse, putting even whales at risk. Earth’s history has seen five major extinction events, and humanity would now face its own near total extinction.The loss of soil and vegetation would prevent any chance of reestablishing terrestrial ecosystems. Freshwater supplies would dwindle as rivers and lakes disappeared, creating additional challenges for survival. Even the few adaptable species might struggle to find food or shelter, leaving the planet eerily quiet except for the sounds of the relentless ocean. Entire ecosystems that once thrived on land would vanish forever, while surviving organisms would compete fiercely in the limited remaining habitats. Humanity would confront the harsh reality that Earth would never again resemble the world we once knew.Day 765: Surviving the New WorldTwo years after the ice caps melted, between 70% and 90% of species including humans would be gone. The few remaining survivors would rely on rafts, boats, and underwater habitats. Desalination and air supply systems would support some communities, but resources would be limited. Disease and malnutrition would be rampant, and storms would become far more dangerous on a planet with no land to weaken them.Floating communities would create systems of trade, farm algae for food, and attempt to maintain some semblance of society. Still, survival would remain tenuous, and only the most resourceful or fortunate would thrive.Year 200: Humanity’s Final StruggleAfter 200 years, Earth would be unrecognizable. In a worst case scenario, humanity could face near total extinction. In a slightly more optimistic outcome, a few hundred thousand people might survive, scattered across floating and underwater settlements. Evolutionary adaptations could emerge, similar to traits already seen in the Bajau and Monken peoples, allowing humans to dive deeper and see better underwater.However, even with these adaptations, long term survival is unlikely. Infant mortality would be high, malnutrition would persist, and conflict over scarce resources could wipe out the remaining population. While humans evolved from ocean dwelling ancestors, our species is fundamentally designed for land. Without it, the odds of fully adapting to a permanent waterworld are slim.While complete submersion of Earth is an extreme scenario, it highlights the fragile balance between land, sea, and life. If ice continues to melt over millennia, the process would take thousands of years, but the consequences for our planet and species remain a stark warning about the impact of climate change.