Part I

The first time Frank McCoy noticed the thermal anomaly, he was eating a sandwich in his truck parked outside a closed church in McDowell County.

The satellite image was open on his laptop, the screen bright in the dim cab. He had been reviewing routine thermal scans of the Appalachian coal basin—his job, or part of it, at the Appalachian Coal Safety Authority. The scans were supposed to detect underground coal seam heating, a precursor to spontaneous combustion. Frank had seen thousands of them over twenty years and most of them showed nothing. A few showed old mine fires, controlled and capped. A few showed new heating that required follow-up.

This one showed something else.

A thermal signature, approximately 2.3 square kilometers in area, centered in a region of the basin that should have been cool. The temperature differential was 14 degrees Celsius above ambient. The shape was irregular, consistent with a subterranean fire front moving through a coal seam.

Frank took a bite of his sandwich. He zoomed in on the coordinates. The fire front was located in the old Hamilton Seam, which had been sealed in 1998 after a gas explosion. The seam was supposed to be inert, flooded with nitrogen, monitored by a network of ventilation shafts that had not been maintained in six years.

He drove to the site. He walked the sealed entrance. He checked the nitrogen pressure gauge and found it reading zero. The seal was intact, but the atmosphere inside the Hamilton Seam was no longer being actively protected.

He wrote a report. He submitted it to his supervisor, who forwarded it to the regional office, which acknowledged it with a form letter dated three weeks later.

Part II

Frank was forty-four years old and he had been a coal safety engineer for twenty-two years. He had seen seventeen mining deaths in that time. He had written reports about them. He had attended funerals for three of the men.

His wife Marian died of silicosis five years ago. It took eighteen months from the first cough to the last breath. She was forty-one. She had never worked in a mine, but the dust followed the miners home on their clothes and their skin and their shoes, and she breathed it in while she cooked dinner and folded laundry and kissed him goodnight.

His son Sean refused to go underground. "I'm not dying for coal, Dad. You can understand that." Sean had gone to Denver and worked in IT and he called Frank once a week on Sundays and they talked about sports and the weather and nothing that mattered.

The regional office sent an inspector to the Hamilton Seam site in April. The inspector confirmed Frank's reading. He recommended an emergency nitrogen injection and a full structural assessment of the seal. The budget for emergency response had been cut by forty percent the previous fiscal year. The recommendation was logged and shelved.

In June, the summer heat pushed ground temperatures above ninety degrees for eleven consecutive days. Frank stayed in his office with the air conditioning broken and watched thermal satellite images update daily. The fire front in the Hamilton Seam had grown by 0.4 square kilometers. It was moving toward an unsealed coal seam three kilometers away—a seam that had never been mapped in detail because it had never been economically viable to mine.

If the fire bridged to that seam, the affected area would expand exponentially. Frank calculated the parameters. He estimated the volume of combustible gas that would be generated. He estimated the probability of surface venting.

The probability was 0.87.

He wrote another report. He did not eat his sandwich this time. He watched the satellite images while he typed and when he finished he closed the laptop and sat in the truck and he looked at the closed church across the road and he thought about how many churches there used to be in this county and how many there were now and how the ratio was a better indicator of coal prices than any report the Bureau of Labor Statistics published.

Part III

The fire bridged on the nineteenth of August.

Frank was not on duty. He had taken the day off because his back hurt and his doctor had said rest would help. He was mowing the lawn behind his house in Welch when his phone rang. It was Rebecca Chen at the EPA, his contact for cross-agency reporting.

"Frank, the satellite just confirmed it. The Hamilton Seam fire has bridged to the unexplored seam. The burn area is already 4.7 square kilometers and growing."

"How fast?"

"At least two meters per day through the seam, maybe more if there are fissures I can't see from orbit."

He sat on the mower. The lawn was uneven where he had stopped cutting.

"Can you contain it?" Rebecca asked.

Frank looked at the sky. It was the color of concrete. "Rebecca, the town that sits above this seam has three thousand people. They don't have the equipment to inject nitrogen at this volume. They don't have the funding. They don't have—"

"I know what they don't have, Frank."

He knew she was right. He had helped defund her agency three years ago when he sat on a budget committee and voted to cut cross-agency monitoring because "redundant data collection was inefficient."

The fire spread. Two meters per day. Four. Eight. The surface above the burn area began to smoke. Not fire—smoke, from fissures that opened in the ground like wounds. Trees died in a ring two kilometers wide. The creek that ran through Welch turned brown and then black and then dry.

The county tried to organize an evacuation. The National Guard was deployed. But the smoke was not dangerous at ambient concentrations and the fissures were not expanding fast enough to justify an emergency declaration and so the three thousand people who lived above the Hamilton Seam stayed in their houses and they opened their windows and they watched the ground smoke and they went to work the next day.

Part IV

Frank went to work on Monday.

He drove through McDowell County and past the closed churches and the for-rent signs and the mining equipment sales lot that had been closed since 2016 and he stopped at the diner in Welch and he ordered coffee and eggs and he read the local paper on his phone and none of the articles mentioned the fire.

He drove to the Appalachian Coal Safety Authority office. He sat at his desk. He opened the thermal satellite feed and watched the burn area expand from 12.3 to 12.7 square kilometers while he ate his lunch.

He submitted a report that afternoon. It was titled "Subsurface Thermal Event, Hamilton Seam Complex, McDowell County, West Virginia" and it contained forty-two pages of technical analysis, containment recommendations, and risk assessment models. It was filed under "Routine Monitoring" and it would be reviewed during the next fiscal budget cycle, which was seventeen months away.

He went home. He mowed the rest of his lawn. He called his son on Sunday and they talked about baseball.

Outside his window, the sky was gray. Not because of clouds. Because of the air.