# The August Humidity

## What Summer Feels Like When You're Running Power-Hungry Cyberware

August in GLMZ is a physics problem. The atmospheric processors that manage the city's air quality were designed for the temperate Great Lakes climate of the mid-21st century, not for the subtropical summers that climate change has delivered to the mid-22nd. On the worst August days — temperature 38 degrees Celsius, relative humidity 94%, dew point high enough to condense water on any surface below body temperature — the processors operate at capacity and achieve approximately 60% of their intended effect. The remaining 40% is handled by the human body's cooling system, which in a population that is 78% augmented, means the human body's cooling system plus whatever heat the augmentations are generating.

Cyberware runs hot. This is a fact of physics that no manufacturer has fully solved. A cybernetic arm draws between 15 and 40 watts from its power cell, and thermodynamics dictates that a significant portion of that energy becomes waste heat. In winter, this is a benefit — the chrome arm is warm, the heat supplements the body's thermal output, and the 3.2-kilogram weight that is otherwise a burden becomes a portable heater. In August, the arm becomes a furnace. The chrome surface, heated from within by its power cell and from without by the ambient air, reaches temperatures that the skin at the interface zone was not evolved to endure. Heat rash at the interface is universal. Heat-related malfunction — lubricant thinning, power cell overheating, sensor drift — is common. The specific sensation of carrying augmentations in August heat is the sensation of wearing a machine that is trying, and failing, to be as comfortable as the flesh it replaced.

The smell of the city in August is the smell of a metabolism pushed past its limits. The recycled water in the Shelf's plumbing system warms in the pipes and develops a biological activity that the filtration system struggles to suppress — a faint, organic undertone in the tap water that residents describe as "summer flavor" and that water quality reports describe as "within acceptable biological parameters." The nutrient paste softens in the heat, its texture degrading from merely unpleasant to actively repulsive. The polymer walls of the Shelf outgas at an accelerated rate, and the chemical sweetness that is merely noticeable in spring becomes a persistent, cloying presence that flavors every breath. Chrome gleams with condensation — augmented limbs and hands and faces sweating a mechanical sweat, water from the saturated air depositing on metal surfaces in a fine film that makes the chrome look alive, organic, as if the machine parts have developed their own biology in response to the heat.

The nights do not cool. The Shelf's thermal mass — concrete, polymer, and chrome, heated through a twelve-hour day — releases its stored energy through the night, maintaining interior temperatures above 30 degrees well past midnight. The rooftops fill with residents seeking the fractionally cooler air above the building line, lying on polymer sheets and thermal wraps, their BCIs dimmed to sleep mode, their augmented limbs elevated to encourage convective cooling. From above, the rooftops of the Shelf in August look like a hospital — row upon row of prone figures, motionless, tended by the faint glow of BCI indicators and the distant hum of atmospheric processors that are losing their fight with the season. Heat management is the subject. Heat management is always the subject. In August, the Shelf thinks about nothing else, and every thought about heat is also a thought about power, because the power that runs the cooling systems is the power that runs the augmentations is the power that runs the Quanta economy, and August is the month that reminds the Shelf that energy is finite and bodies are warm and chrome remembers every degree.