Chapter Thirty-Seven Six Hours of Air
CHAPTER THIRTY-SEVEN
Six Hours of Air
The valve house had no power.
That was the good news.
Dead motors could not fail worse.
The bad news was the room had been sealed for years and the emergency filter had collapsed into gray powder inside its housing.
Pax stared at it from the floor while Nella wrapped his ankle.
"How long?"
Eden checked the room volume.
Eight people.
Two lamps.
No open flame.
Caro had written six hours.
Caro had been one person, maybe two.
"Less than three if we can't exchange air."
Nobody spoke.
The storm outside would last longer than that.
Rhett opened the western maintenance panel.
Dust pushed through the seam immediately.
He closed it.
"No."
Pax pointed toward the old filter housing.
"We need media."
"From what?" Lio asked.
"Layered cloth. Charcoal if there's any. Fine mesh. Anything that traps particulate without choking flow."
Torren opened cabinets.
Empty.
Nella checked the hand pump.
"Water."
A thin stream came out brown, then clear.
That solved thirst.
Not air.
Eden looked at their equipment.
Masks.
Blankets.
Clothes.
The survey tarp was under Pax.
Then she saw the truck prefilter Pax had packed into his tool bag.
He followed her eyes.
"No."
"Why?"
"That's for the lead rig."
"Which is eight miles away."
"A very good truck."
Rhett held out his hand.
Pax clutched the filter.
"Traitor."
"Alive mechanic first. Truck later."
Pax surrendered it.
Too small.
But the pleated media could be cut and combined with cloth.
They dismantled Caro's failed housing.
Eden found the problem.
The original filter had not simply worn out.
Rodents had chewed through the edge seal after the station was abandoned.
Dust bypassed the media.
"Housing is usable," she said.
Pax shifted painfully.
"Give me the clamp ring."
Nella looked at him.
"You're staying off that ankle."
"Hands still employed."
They worked on the floor.
Pax cut the truck filter.
Rhett stripped two cotton overshirts into layers.
Torren crushed charcoal from the old emergency stove between pieces of mesh.
Eden reseated the housing and sealed gaps with resin tape from her survey kit.
They had built prettier systems in calmer places.
This one mattered more.
The vent lever opened.
Air moved.
Weakly.
Dust darkened the first cloth layer almost at once.
But none entered the room visibly.
Pax watched a strip of thread tied to the vent.
It fluttered.
"Ugly."
Rhett sat against the wall.
"High praise."
"Functional."
Everyone exhaled.
They set a rotation to check the filter every thirty minutes.
The storm turned the outside world into a continuous low roar.
No one could travel.
No one could fix Flint's road.
No one could do anything except wait and keep the air moving.
Eden disliked waiting almost physically.
She sat beneath Caro's writing.
Rhett lowered himself beside her.
"You are counting minutes."
"Yes."
"Stop."
She looked at him.
"Useful advice."
"I contain multitudes."
"Mostly bad ideas."
He smiled.
Across the room, Nella slept with her head against a valve wheel. Torren and Lio played a quiet card game using grease-marked scraps. Pax had finally stopped complaining, which meant the pain medicine had worked.
Rhett looked at Caro's note.
"She saved us."
Eden considered.
"She warned us."
"Difference?"
"We still had to build the filter."
He nodded.
"You like that difference."
"Yes."
Caro had not reached through time and rescued anyone.
She had recorded a defect.
People living later used the record.
That felt cleaner than destiny.
Rhett stretched his injured side carefully.
The stitches were gone now, but he still moved differently when tired.
Eden noticed.
"Does it hurt?"
"Some."
"You should have stayed at Reservoir Three."
"No."
Too immediate.
She looked at him.
Rhett corrected himself.
"I could have stayed. I chose not to."
Better.
"Why?"
"Because I wanted west."
"Only west?"
He looked toward the others.
Then back at her.
"No."
The answer warmed something low in her chest.
Eden looked at the door.
"This is not the kind of romantic setting people mean."
"You don't enjoy underground air failure?"
"I have standards."
"I've heard rumors."
Silence returned.
Not awkward.
The kind that existed when no one needed to fill it to prove connection.
An hour later, the filter pressure rose.
Pax woke immediately.
"Change outer layer."
They did.
Another hour.
Another layer.
The storm kept hitting.
At hour five, the roar weakened.
At six, the vent thread hung almost still.
Not from failure.
No wind.
Eden opened the west panel one finger width.
Gray light entered.
No dust blast.
She opened it wider.
The world outside had changed.
Black powder covered the red ground.
Every track was gone.
Every footprint.
Every mark they had followed.
The pipeline posts barely showed above drifts.
Torren came beside her.
"Road's gone."
Eden looked at the buried corridor.
"No."
He raised a brow.
She pointed to the line of posts.
"Road's still there."
The distinction mattered.
They would have to find it again.