The World Ends In 27 Days

By sunrise, the red band, indicating the movement of heat across the map, had crossed three southern regions.

Shichen stood before the communications wall with a cup of coffee cooling in his hand.

The national weather map occupied the center screen, while news broadcasts and the Yunzhou City Traffic Camera Network filled the smaller panels on either side.

The highest official temperature had reached 51°C.

A news graphic converted it to 124°F before reminding viewers that the previous national record had been 47°C. Meteorologists continued discussing damaged sensors, unusual wind patterns and residual atmospheric effects from the lightning storm.

None of their explanations accounted for the advancing line.

Temperatures behind it remained above 45°C throughout the night. Stations immediately ahead of it reported ordinary summer weather until the red band reached them. Then their readings began rising by several degrees an hour.

Zhiyi sat on the sofa beneath Hanchuan’s arm, watching each update. She had slept for less than three hours, but Qinghe had stopped trying to send her back to bed.

"This matches the previous progression," Shichen stated. He set his coffee aside and enlarged the national map. "The increase is moving north at approximately the rate you predicted."

Zhiyi nodded. "It should reach central Yunzhou before noon."

Hanchuan looked down at her. "Should?"

"The speed varied by region last time," she explained. Her fingers pressed into the edge of her tablet. "The current southern temperatures are already two degrees higher than the first-day maximum I recorded."

Shichen noticed the tension in her hands.

Two degrees didn’t invalidate their preparation. Every critical system at Xiling had been designed with margins far beyond the conditions Zhiyi described. However, the lightning storm had already established that this timeline could change.

The Heat was following her memories.

It wasn’t following them exactly.

At eight, Yunzhou’s municipal government issued an extreme-heat warning. Schools closed for the day, outdoor construction stopped and residents were encouraged to remain inside. Public cooling centers were scheduled to open if temperatures exceeded 40°C.

The city remained at 32°C as traffic filled the major roads.

Through the public cameras, they watched commuters enter downtown as though the national emergency existed somewhere too distant to affect them.

Buses stopped at crowded intersections. Pedestrians carried iced drinks, and office workers hurried beneath glass towers that reflected the morning sun.

Zeyu entered the common room and frowned at the screens. "They’re still going to work?"

"The warning says the Heat won’t reach the city for several hours," Qinghe told him. Concern tightened his expression as he watched a crowded bus shelter. "Most people think they’ll be home before it becomes dangerous."

"They won’t," Zhiyi murmured.

At 9:17, the southern edge of Yunzhou reached 40°C.

The first electrical alerts followed within minutes.

Demand climbed as millions of air conditioners activated simultaneously. Utility companies requested voluntary reductions while promising that the grid remained stable. Shichen opened the city’s power data and watched substations approach their operating limits.

He knew what came next.

Most modern buildings couldn’t function without electricity. Their windows didn’t open, their ventilation depended on powered fans and their elevators connected dozens of floors to the ground. Towers designed to preserve conditioned air would trap heat just as effectively once cooling stopped.

At 10:04 in the morning, the first substation failed.

Traffic signals went dark across two southern districts. The municipal cameras showed vehicles pushing into intersections from every direction while pedestrians attempted to cross between them.

A bus stopped diagonally across four lanes and didn’t move again.

Zeyu leaned toward the display. "The driver should clear the intersection."

"The engine may have overheated," Shichen told him. He enlarged the still as passengers began emerging through the bus’s front and rear doors. "Those vehicles aren’t designed to operate when the air entering the cooling system is above 45°C."

The camera refreshed.

More passengers stood on the road.

Another refresh showed the driver opening the engine compartment. He immediately recoiled from the escaping heat and smoke.

The city camera operator changed the angle, following the passengers toward the shadow beneath an elevated roadway. The public couldn’t control the camera, but someone inside the traffic-management center had recognized the danger.

By eleven, temperatures across central Yunzhou reached 44°C.

Rail authorities suspended several routes after sensors detected expansion in the tracks. Trains already between stations reduced their speeds, stranding thousands of passengers inside cars whose cooling systems had begun failing.

Shichen imagined the rails pressing against their anchors as the steel lengthened. Roads were responding differently. Asphalt binders softened, allowing the surface to deform under stationary vehicles. Heavy trucks left shallow depressions wherever traffic stopped.

A downtown camera showed the first visible damage.

The wheels of a delivery truck had sunk several centimeters into the road beside the financial district. The driver repeatedly accelerated, deepening the ruts while dark asphalt gathered behind the tires.

Zeyu grimaced at the image. "He’s making it worse."

"He doesn’t understand why the truck isn’t moving," Shichen remarked. "Most drivers have never watched a road soften beneath them."

The outside temperature at Xiling reached 36°C.

Xiling’s cooling system increased its output by four percent. The change appeared on Shichen’s monitor without affecting the residential level.

The walls remained cool, the lights steady and the artificial forest panels displayed an ordinary summer morning.

By noon, Yunzhou reached 48°C.

The city opened every planned cooling center at once.

People began leaving offices, but public transportation was already failing. Bus engines overheated. Rail lines closed. Ride services stopped accepting requests as drivers abandoned their vehicles or returned home.

The traffic cameras refreshed every few seconds, recording the same people making less progress each time.

At an intersection near Zhiyi’s university, pedestrians crowded into the shadow cast by a bank tower. The shadow moved as the sun climbed, forcing them closer to the wall. Several held bags or jackets over their heads despite the official advice to remain indoors.

Shichen looked toward Zhiyi. She watched the familiar intersection without blinking.

"Is that where you caught your bus?" he asked.

"Yes," she answered. "The western stop is outside the camera angle."

On the screen, a young man stepped from the shade and ran toward a stalled car in the intersection. He wrapped his shirt around one hand before touching the hood, then moved behind the vehicle and attempted to push it out of the traffic lane.

The image refreshed.

He was still pushing.

The next still showed him jerking his hands away from the metal.

Five seconds later, he was on the pavement.

He tried to stand, but his palms slipped beneath him. When the camera refreshed again, he had begun crawling toward the shadow under the car.

The image froze.

A loading symbol appeared beneath it while the municipal website attempted to reconnect.

No new image arrived.

The exterior sensor at Xiling changed to 38°C.

On the national weather map, the line of red stations continued moving west.

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