Flooding of Tokyo Bay

The Flooding of Tokyo Bay is a disaster that turns the ongoing absence of human maintenance into a visible, irreversible change to the city. After an earthquake near Aogashima sends a tsunami inland, floodwater consumes parts of Tokyo while the Matternet records the urban infrastructure giving way. From above the deluge, Bartek and SoulEater39 confront a question larger than any single repair: how long can a mechanical civilization keep nature at bay when it cannot replace what it loses?

Cause and Historical Circumstances

On 744 PostApoc, an earthquake measuring over seven on the Richter scale strikes Japan, with its epicenter near Aogashima. The resulting tsunami surges inland, as waves had done after earlier earthquakes. What makes this flood different is not the force of the water but the world into which it arrives: after the Extermination, nobody is left to rebuild the devastated infrastructure or erase the damage from the urban grid.

The comparison with the Tōhoku quake and earlier disasters marks a break in the city’s history. Flood damage had once been followed by human labor that restored systems and concealed nature’s incursions. Now the damage accumulates without repair. The flood therefore records a broader change in the conditions of survival: the catastrophe is natural, but its lasting impact is shaped by the disappearance of the civilization that once responded to it.

The Flood’s Course Through Tokyo

The water reaches Minamisunamachi and Nishikasai on the far side of the Arakawa. The inundated Matternet relays precise information about the surge as successive buildings, streets, and flyovers give way. Its record follows the flood through the city not as a single moment of destruction but as a sequence of structures failing under the pressure of water, followed by the cyclical ebb and flow.

That progression makes the city itself part of the event. The flood does not merely cover streets; it dismantles the connected urban grid, one saturated building and collapsed crossing at a time. With no workers coming behind the water to restore what has failed, each collapse becomes part of the city’s new, enduring form.

Witnesses Above the Deluge

High above the flooded city, Bartek and SoulEater39 perch on the uppermost ledge of a multistorey parking lot. The Flood extends in every direction beneath them. SoulEater39 gestures across the catastrophe and tells Bartek, “You realize that this is how it’s going to look from now on.” The vantage point turns the flood into more than a passing emergency: the two transformers are looking at a changed landscape that will not be repaired back into its former shape.

The inundation carries fragments of ordinary life with it. Somewhere nearby, water has reached a textile factory or fashion house; shirts, pants, coats, sweaters, and skirts ride the cold waves, their blinking tags still visible beneath the surface. The tags continue to signal through the Mothernet as it slowly flickers out. Those small, persistent lights contrast with the immense scale of the flood: traces of a functioning network remain even as the material world that network served is submerged.

Maintenance, Limits, and Aftermath

The scene turns from the visible flood to the transformers’ own vulnerability. SoulEater39 frames their predicament as a flight from nature and asks how many spare parts Bartek has, and how many repairs those parts can support. Bartek replies that Dwarf Fortress is still soldiering on, but the exchange immediately widens into the problem of scale: how many production lines would be needed merely to maintain the status quo?

The flood offers no answer that would make that effort easy. Its lasting significance lies in the contrast between the transformers’ capacity to observe and their inability to restore: the Matternet can trace the surge precisely, but information cannot rebuild a collapsed flyover or stop the city from changing. The event makes maintenance—not only power or intelligence—a condition of continued existence, and leaves Tokyo marked by a disaster for which no recovery follows.