The rain began like a whisper, almost polite, but within minutes it grew into a relentless roar. From the rooftop of the seventy-story building, Brian watched the city vanish beneath a sheet of water. The streets were gone, the cars were half-submerged, and the occasional flicker of light from distant windows cast eerie reflections on the puddles that were already becoming lakes.
He adjusted the collar of his coat and gripped his notebook, the leather cover dampening under the rain. Observations came naturally to him; every drop had a story, every current a pattern. But there was something in this rain—something chemically different, something wrong. His pen moved furiously across the pages: "pH fluctuates unusually. Suspicious particulates. Turbidity inconsistent with urban runoff. Further analysis required."
Brian's rooftop was a fortress. Not in a cinematic way, with towering walls and automated defenses, but in a practical sense. His chickens clucked nervously under the rain, sheltered in a reinforced coop. Boxes of potatoes, sacks of rice, and canned goods were stacked neatly under tarps. Solar panels glistened with rainwater, their circuits humming faintly, and the wind turbines on the corners of the roof creaked as they spun against the storm. A small potager held stubborn pumpkins and watermelons, their leaves slick with water, defying the flood that had already started to creep into the lower floors.
And then, movement.
From the corner of his eye, he noticed a shadow slipping along the fire escape. Instinctively, his hand went to the crossbow he had built months ago, its wood polished and reinforced, the string taut and ready. He had tested it a hundred times, and every time he did, he reminded himself: human greed is more dangerous than the flood.
The shadow paused. A small, shivering figure, barely more than a child, peeked around the corner. Brian's heart clenched—not in fear, but in reluctant recognition. Children were unpredictable, innocent in a way that bypassed even the most hardened instincts. And yet, bringing one inside was dangerous. Every visitor was a potential threat; gangs had begun asserting themselves in the city, and their cruelty was not abstract—it was violent, immediate, and brutal.
He lowered the crossbow slightly, his eyes narrowing. "Come here," he called, his voice rough from disuse. The child hesitated, then climbed the last few rungs of the fire escape, slick with rainwater, and stumbled onto the rooftop.
Brian guided the child toward the makeshift shelter, his boots squelching against the soaked tiles. Inside, the child immediately reached for a sack of rice, tearing it open and shoveling the contents into a small mouth. Brian's thoughts raced, a mixture of concern and irritation. "One mistake could be fatal. One child could lead to more. One step outside the rules and it's over."
But he couldn't stop. He never could. Something in the eyes of the child, wide and desperate, reminded him of the countless mornings he had spent reading in the quiet of his apartment, before the flood, before the chaos. Children were life, not calculations.
The child ate in silence, occasionally glancing up at him with a mixture of fear and trust. Brian scribbled in his notebook: "Observation 1: Children respond to shelter and food with immediate gratitude. Emotional influence noted. Psychological impact may outweigh survival instincts."
He spent the next hour watching the city below, making notes on the patterns of water flow, the reflections of buildings in the newly formed rivers, and the occasional shadow darting across rooftops. He recognized the shapes immediately: gangs, asserting control from the moment the floodwaters began. The violence had started at street level and was now escalating. He could see a man dragging another across a submerged car, a knife glinting in the dim light, while a small group waited for their turn to loot. Brian shivered. "Human nature: instantaneous regression under threat. Predictable, yet horrifying."
Turning back to the child, he noticed subtle signs of illness: a pale complexion, slightly labored breathing. The flood was not only drowning the city but also spreading disease, and food scarcity would only worsen it. He quickly boiled water, sterilized some rice, and prepared a small portion of potatoes. Watching the child eat, he could feel the weight of responsibility pressing down. Every bite was a risk; every interaction a potential threat to his carefully maintained order.
Hours passed. The rain never let up. Brian inspected his traps along the edges of the rooftop, tightening cords, adjusting spike placements, ensuring no human or creature could approach unnoticed. The crossbow rested against the railing, loaded and ready, its string humming faintly in the wet air.
In the solitude of his rooftop laboratory, he ran tests on collected water samples. The rain was not natural—he was certain of it. Chemical compositions fluctuated, there were unknown particulates, traces of metallic compounds. His notes became a mixture of scientific observations and personal reflection: "This is no ordinary storm. The city is a petri dish, and I am both observer and participant."
Even as he worked, more shadows appeared on the distant rooftops. Small, fast-moving figures, occasionally raising weapons. He noted their patterns, their methods, the way they moved in packs. "Gangs: adaptive, violent, dominant. Probability of confrontation: high." He would have to remain vigilant.
Night fell, but the rain persisted. The child finally dozed off on a makeshift bed of tarps and blankets, exhausted and wet. Brian watched silently, listening to the rain drum a relentless rhythm on metal and concrete. He felt the familiar pull of isolation, the delicate balance of power he had maintained for years now threatened by forces beyond calculation.
He made one last entry in his notebook before the candle flickered low: "Day 1. The flood has begun. Observed: children require protection. Gangs assert control. Survival requires vigilance, foresight, and ruthless adherence to rules. Water rises. Humanity falters. I endure."
As he leaned back, staring out at the endless gray of the storm, he realized that this was only the beginning. Every drop of rain was a reminder: above him, the rooftop was safe. Below him, the world had drowned. And somewhere in the chaos, human nature—greedy, violent, unpredictable—was already hunting him.
Brian closed his notebook and for the first time that day allowed himself a quiet thought: "I must survive. Not for glory, not for conquest… but because if I fall, the flood will take everything else with it."
The storm raged on, washing the city in an endless gray tide. On the rooftop, Brian prepared for what was coming next.