The Severed Line

Could a man outrun thirty feet of rising floodwater with fifty pounds of lead ballast strapped to his hips? Tidjani hauled his boots across the slippery intake grating of Sump Turbine 4, his eyes fixed on the vertical maintenance ladder forty feet below the drowned streets of Nouar-el-Bahr. Topside was silent, the copper intercom dead after three muffled gunshots, and he needed both hands on those steel rungs before whoever had dropped Mansouri came down the riser to finish the job.

The dead wire dragged behind his brass collar like dead weight. No hum carried down the copper core. No rasp of Zahara’s breathing cut through the seal.

Tidjani lunged toward the concrete corner where the galvanized steel ladder met the trash rack. Every kick stirred thick, greasy plumes of urban silt and raw canal runoff. The water here had turned viscous, thickened by the foul discharge seeping from the seized runner throat behind him.

Above him, thirty vertical feet of black stormwater separated the flooded turbine vault from the mezzanine deck. Below him, eighty thousand gallons of choked sewer drainage ground against the jammed bronze runner blades with a dull, subterranean moan.

The rung was three feet from his outstretched glove when the intake current reversed.

A violent backwash slammed into Tidjani’s chest, throwing him back against the iron ribs of the trash rack. The water did not surge with the loose, turbulent chop of an open storm canal. It pulsed in rhythmic, hydraulic spasms, warm and thick, reeking through the suit's exhaust diaphragm of curdled tallow and sweet, rotting bone marrow.

Inside the runner throat, the flesh-dam was waking up.

The gunshots topside had sent shockwaves down the steel riser tube, or the remote digital lockout on the emergency solenoid had altered the hydraulic circuit. Whatever the cause, the pale mass wedged between the bronze blades contracted in a single, convulsive knot.

Tidjani dug his steel-toed boots into the grating, fighting the sudden draft toward the impeller hub. In the swirling gloom, the yellow halogen beam on his chest harness caught the mouth of the runner casing.

The five-foot-thick wall of fused muscle was no longer inert. Thousands of translucent feeding filaments bristled along its perimeter, whipping the blackwater into a pale, curdled froth. Thick, ringed muscle trunks, gray-white and ridged like corrugated drainpipe, uncoiled from the center of the mass and lashed against the turbine casing.

One of the trunks slammed into the concrete arch six inches above Tidjani’s helmet. The impact rang through his copper bonnet like a dropped sledgehammer.

He did not wait for a second blow. He grabbed the third rib of the trash rack with his left arm and reached down with his right to secure the umbilical bundle trailing over his shoulder.

The triple hose—supplying mixed breathing gas, pumped scalding water for his drysuit lining, and wired communications—looped wide across the open throat of the intake. In normal operations, Zahara kept twelve pounds of topside tension on the winch to keep the line clear of the blades. With Zahara down and the winch operator's booth abandoned, the reinforced rubber hose sagged into the center of the vortex.

"Pull, damn you," Tidjani muttered into the empty dome of his helmet.

A second muscular tendril whipped out of the churning dark. It was as thick as a utility pole, studded with ringed horn teeth that scraped across the bronze runner casing with the screech of dry metal. It did not strike Tidjani. It coiled around the slack loop of his umbilical line and heaved backward toward the seized hub.

The line snapped taut instantly.

The sudden yank jerked Tidjani’s shoulders toward the dark opening of the runner throat. His boots lost purchase on the slime-slick grating. He hit the submerged deck hard, his lead belt clattering against the steel plates.

Tidjani dropped his pneumatic chisel and grabbed the service rail with both hands. The pull was monstrous, driven by tons of living muscle anchoring itself into the machinery. The hose strained, the vulcanized rubber groaning against the brass crimps at his back manifold.

Then the tendril flexed again, dragging the bundle across the machined bronze edge of the seized runner blade.

The hose did not part quietly.

A dull, concussive crack ripped through the water as two hundred pounds of surface gas pressure ruptured the primary supply line. The severed hot-water tube burst in the same fraction of a second, spewing boiling glycol brine into the dark before going entirely slack.

The hot water inside Tidjani’s suit vanished instantly.

Freezing sewer brine flooded the heating coils around his ribs and thighs, driving the breath from his throat with the shock of ice water. At the same moment, the severed air line began screaming behind his neck, venting his primary gas supply into the swirling pool with a deafening, bubbling roar that threw him into a spin.

Air blasted away from his helmet regulator. The pressure needle on his chest console whipped counter-clockwise toward zero.

Panic was a rookie’s luxury. If he took two lungfuls of vacuum, his chest would collapse under forty feet of hydrostatic head before he could touch the ladder.

Tidjani let go of the service rail with his right hand. He reached over his right shoulder, ignoring the violent spin of the water and the blinding cloud of vented bubbles churning around his faceplate.

His gloved fingers found the brass crossover manifold mounted at the base of his neck.

The primary supply check valve was chattering violently, spitting gas into the flood. Tidjani jammed the heel of his palm against the serrated knob and threw his weight into a full clockwise twist, slamming the topside intake port shut. The deafening roar stopped instantly.

The silence inside his helmet was absolute, broken only by the scrape of his teeth against the rubber mouthpiece.

He was breathing dead gas from the small internal volume of the helmet bonnet. His chest hitched as the remaining oxygen thinned.

Without pausing to look, his left hand dropped to his left hip, tracing the steel strap of his harness until his thumb hooked the wheel valve of the bailout cylinder strapped across his lumbar.

He spun the brass handwheel four full turns until it clunked against the stop.

A sharp, cold hiss answered him. High-pressure trimix surged through the secondary regulator, filling his copper bonnet with sweet, metallic gas. Tidjani drew a long, ragged breath, his lungs burning from the brief vacuum.

He had twenty minutes.

At heavy working exertion forty feet down, the twenty-cubic-foot aluminum bottle mounted to his back held eighteen to twenty minutes of gas before the pressure dropped below regulator cutoff. After that, he was breathing raw canal water.

The violent torque on his harness had ceased. The severed end of his umbilical line drifted in front of his faceplate, frayed neoprene and copper strands swaying like dead river kelp in the eddy.

Tidjani reached down and unclipped the dead whip from his harness D-ring, letting the ruined sixty-foot tether sink into the sludge between his boots. The municipal bureau would dock his hazard pay for the lost twenty meters of reinforced hose, assuming anyone topside survived to tally the invoice.

He planted his boots back on the iron deck and surveyed the chamber.

The yellow beam of his chest lamp cut through the murk, picking out the churning mouth of the runner casing. The pale biomass had retracted slightly into the hub, its feeding suckers trembling as they digested the rubber and brass fittings shredded in the blades. It remained firmly anchored across the impeller, blocking the city’s drainage vein as billions of gallons of storm runoff piled up against the seawall above.

The cold was settling into his limbs now. Without the surface heating truck pumping boiling water down the line, the four-degree canal water was bleeding the heat from his core through the thick vulcanized rubber of his drysuit. His fingers inside the three-finger mitts felt stiff, clumsy against the knurled hilt of the pneumatic blade locked in his thigh sheath.

He glanced toward the maintenance shaft.

The steel ladder rose thirty vertical feet through black, impenetrable water. Above the surface, somewhere in the darkened pump room, armed men were standing over Zahara’s winch truck.

Tidjani checked the brass gauge clipped beside Sensor 14 on his chest harness. The needle rested on one hundred and eighty bar.

Eighteen minutes. No topside line. No hot water. No radio.

He unlatched the pneumatic blade from its thigh holster, turned his back on the surface ladder, and stepped toward the black throat of the emergency bypass siphon.