The rain had not ceased. If anything, it had intensified overnight, hammering the rooftop with a steady, deafening rhythm. Brian rose before dawn, boots squelching against the wet tiles, and moved to check his defenses. The traps along the edges of the roof were in place: cords tight, spikes aligned, and improvised alarms rigged with small metal cans that would rattle at the first touch. Every detail mattered. One misstep, one misjudgment, and everything could collapse.
He scanned the flooded city below. Half-submerged vehicles bobbed like debris, streetlights flickered, and shadows moved along rooftops and balconies with uncanny coordination. Gangs were no longer just a rumor—they were visible, methodical, and violent. Brian watched as one group dragged a body across the remnants of a car, knives flashing, another looting a small shop now fully underwater. Their world had shifted overnight, but they had adapted with horrifying efficiency.
Brian's thoughts returned to the child from the previous day. Sleeping fitfully in a corner of the rooftop, covered in blankets, the small figure stirred occasionally, whimpering at the sound of wind and rain. Brian approached cautiously, checking for fever and signs of hypothermia. Children were fragile, unpredictable, but he had made a rule for himself: no child left to the flood.
He prepared a simple breakfast: boiled potatoes mixed with a small portion of rice, salted lightly from the last remaining supply. As the child ate, Brian scribbled in his notebook:
"Observation: children respond positively to immediate sustenance. Emotional trust forms rapidly, yet dependency creates long-term risk. Probability of increased exposure to external threats: high."
Even as he recorded the notes, a shadow appeared on the edge of his roof. He stiffened, moving silently toward his crossbow. A figure, small and hesitant, peeked around the corner of a distant building. Not a child this time—an adult. Brian's heart rate quickened. Adults were unpredictable. Some sought help, some sought his food, and some… simply sought to kill.
The adult froze, sensing he had been spotted. Brian didn't lower the weapon. He had learned to let his instincts guide him. After a tense moment, the figure disappeared into the rain, leaving Brian with a mental note: human greed was bold and immediate.
Returning to his lab corner, Brian set about testing the water samples he had collected. He added chemical reagents, measured pH levels, and filtered the liquid through improvised devices. The rain, he noted, was highly irregular. Metallic particles, traces of unknown compounds, and an acidity slightly beyond normal urban runoff suggested a phenomenon far beyond natural weather patterns. He scribbled furiously, combining observations with theory: "This rain is altering everything. Microbial activity is increasing. Aquatic mutations probable. Must observe and document."
While he worked, another movement caught his eye. A small group of children had found their way to the edge of his rooftop. One boy, braver than the others, waved timidly. Brian sighed. His patience was thin, but his principles were firm. Opening the gate, he allowed them in one at a time, giving each small portions of rice and potatoes. The older children whispered, asking questions about the submerged city and the shadows they had seen. Brian answered in clipped, precise sentences, careful not to reveal weaknesses or invite trouble.
The day wore on. He rotated between feeding the children, checking his traps, and recording notes in his journal. His handwriting was jagged, tense, but thorough:
"Day 2. Rain continues unabated. Human threats escalating. Gangs active across rooftops. Children require sustenance; care must be balanced with risk. Water contamination increasing. Food reserves at 50% capacity. Vigilance remains essential."
Brian paused, glancing over the rooftop railing. The city had changed overnight. Streets were rivers, alleys were lakes, and the few humans brave enough to move were either desperate or dangerous. Shadows flickered in the distance—groups of adults moving cautiously, armed, always aware of potential competitors.
He returned to the lab and ran a series of tests on small fish he had caught from a flooded market below. Their scales shimmered unnaturally, phosphorescent patterns glowing faintly in the dim light. The creatures were adapting, mutating. Brian's mind raced with possibilities. Could humans be next? Could the desperation, the violence, the scarcity trigger changes in them as well? He made detailed notes: "Behavioral aggression in adults is immediate. Physiological adaptations possible under environmental stress. Hypothesize: selective pressure accelerated by flood conditions."
Even as he recorded, the children played near the edge of the rooftop garden. Brian's hand hovered over the crossbow, not out of immediate threat, but instinctively, ready for any sudden danger. A part of him hated the vigilance, the paranoia—but another part thrived on it. Every day that he survived, every observation he recorded, made him more certain: only preparation and awareness could save him.
By evening, the rain had intensified further. Water ran in rivulets across the tiles, and the sound of it striking metal sheets created a rhythm that Brian found both hypnotic and alarming. He prepared a simple dinner for the children: rice, boiled potatoes, and the last few eggs from the coop. They ate quietly, exhausted from the day's events, while Brian documented his findings, theories, and the faint patterns of mutant aquatic life emerging in the flooded streets.
Night came, and the city was drowned in darkness and rain. The children slept under tarps and blankets, huddled close together. Brian lit a single lantern, its flickering flame throwing long shadows across the rooftop. He reviewed the day's notes, planning for the next. The traps would need adjusting, the water tests continued, and the children… well, they would keep coming. He could not ignore them, could not abandon them, even when danger lurked so close.
He finally closed his notebook, standing at the edge of the rooftop to watch the storm. The wind tore at his coat, the rain soaked through every layer, but he felt alive in the midst of chaos. The world had drowned, but he remained, a solitary sentinel above the floodwaters, recording, observing, surviving.
And somewhere in the submerged city below, human nature—greedy, violent, unpredictable—moved like a predator. Brian tightened his grip on the crossbow and whispered to himself: "Day 2. They will come. I must be ready. I will survive."
The rain fell harder. The city drowned. And above it all, Brian stood alone, watching, waiting, learning.