“It’s cold,” she said to Nadia. “My ears are burning. I can feel the wind on my eyes. On my face.”
“How long will the niters last?” Nadia said to Sax, speaking loudly to be sure she was heard.
“A hundred hours.”
“Too bad people have to breath out through them.” That would add a lot more CO2 to the filter.
“Yes. But I couldn’t see a simple way around it.”
They were standing on the surface of Mars, bareheaded. Breathing the air with the aid of nothing more than a filter mask. The air was thin, Nadia judged, but she did not feel lightheaded. The high percentage of oxygen was making up for the low atmospheric pressure. It was the partial pressure of oxygen that counted, and so with the percentage of oxygen in the atmosphere so high…
Zeyk said, “Is this is the first time anyone’s done this?”
“No,” Sax said. “We did it a lot in Da Vinci.”
“It feels good! It’s not as cold as I thought it would be!”
“And if you walk hard,” Sax said, “you’ll warm up.”
They walked around a bit, careful of their footing in the dark. It was quite cold, no matter what Zeyk said. “We should go back in,” Nadia said.
“You should stay out and see the dawn,” Sax said. “It’s nice without helmets.”
Nadia, surprised to hear such a sentiment coming from him, said, “We can see other dawns. Right now we have a lot to talk about. Besides, it’s cold.”
“It feels good,” Sax said. “Look, there’s Kerguelen cabbage. And sandwort.” He kneeled, brushed a hairy leaf aside to show them a hidden white flower, barely visible in, the predawn light.
Nadia stared at him.
“Come on in,” she said.
So they went back.
They took their masks off inside the lock, and then they were back in the refuge’s changing room, rubbing their eyes and blowing into their gloved hands. “It wasn’t so cold!” “The air tasted sweet!”
Nadia pulled off her gloves and felt her nose. The flesh was chilled, but it was not the white cold of incipient frostbite. She looked at Sax, whose eyes were gleaming with a wild expression, very unlike him — a strange and somehow moving sight. They all looked excited for that matter, stuffed to the edge of laughter with a peculiar exhilaration, edged by the dangerous” situation down the slope in Burroughs. “I’ve been trying to get the oxygen levels up for years,” Sax was saying to Nazik and Spencer and Steve.
Spencer said, “I thought that was to get your fire in Kasei Vallis to burn hard.”
“Oh no. As far as fire goes, once you’ve got a certain amount of oxygen, it’s more a matter of aridity and what materials there are to burn. No, this was to get the partial pressure of oxygen up, so that people and animals could breathe it. If only the carbon dioxide were reduced.”
“So have you made animal masks?”
They laughed and went up to the refuge commons, and Zeyk set about making coffee while they talked over the walk, and touched each other on the cheek to compare coldnesses.
“What about getting people out of the city?” Nadia said to Sax suddenly. “What if security keeps the gates closed?”
“Cut the tent,” he said. “We should anyway, to get people out faster. But I don’t think they’ll keep the gates closed.”
“They’re going out to the spaceport,” someone shouted from the comm room. “The security forces are taking the subway out to the spaceport. They’re abandoning ship, the bastards. And Michel says the train station — South Station has been wrecked!”
This caused a clamor. Through it Nadia said to Sax, “Let’s tell Hunt Mesa the plan, and get down there and meet the masks.”
Sax nodded.
Between Mangalavid and the wristpads they were able to make a very rapid dispersal of the plan to the population of Burroughs, while driving down in a big caravan from Du Martheray to a low line of hillocks just southwest of the city. Soon after their arrival, the two planes bringing the CO2 masks from Da Vinci swooped down over Syrtis, and landed on a swept area of the plains just outside the western apron, of the tent wall. On the other side of the city observers on top of Double Decker Butte had already reported sighting the flood, coming in from a bit north of east: dark brown ice-flecked water, pouring down the low crease that inside the city wall was occupied by Canal Park. And the news about South Station had proved true; the piste equipment had been wrecked, by an explosion in the linear induction generator. No one knew for sure who had done it, but it was done, the trains immobilized.
So as Zeyk’s Arabs drove the boxes of masks to West, Southwest, and South gates, there were huge crowds already congregating inside each of them, everyone dressed either in walkers with heating filaments, or in the heaviest clothes they had — none too heavy for the job at hand, Nadia judged as she went in Southwest Gate, and passed out facemasks from boxes. These days many people in Burroughs went out on the surface so seldom that they rented walkers to do so. But there were not enough walkers to dress everyone, and they had to go with people’s interior coats, which were fairly lightweight, and usually deficient in headgear. The message about the evacuation had been sent out with a warning to dress for 255°K, however, and so most people were layered in several garments, appearing thick-limbed and thick-torsoed.
Each gate lock could pass five hundred people every five minutes — they were big locks — but with thousands of people waiting inside, and the crowds growing as Saturday morning wore on, it was not anywhere near fast enough. The masks had been distributed through the crowds, and it seemed certain to Nadia that at this point everyone had one. It was unlikely that anyone in the city was unaware of the emergency. And so she went around to Zeyk, and Sax, and Maya and Michel, and all the other people she knew that she saw, saying, “We should cut the tent wall and just walk out. I’m going to cut the tent wall now.” And no one disagreed.
Finally Nirgal showed up, gliding through the crowd like Mercury on an urgent errand, smiling hugely and greeting acquaintance after acquaintance, people who wanted to hug him or shake his hand or just touch him. “I’m going to cut the tent wall now,” Nadia told him. “Everyone has masks, and we need to get out of here faster than the gates will let us.”
“Good idea,” he said. “Let mejust announce what’s happening.”
And he jumped three meters into the ajr, grabbing a coping on the gate’s concrete arch and hauling himself up so that he was balanced on it, both feet on the same three-centimeter strip. He turned on a small shoulder loudspeaker he was wearing, and said, “Attention, please! — We’re going to start cutting the tent wall, right above the coping — there should be a breeze outward, not very strong — after that, people nearest the wall out first, of course — there will be no need to hurry at that point — we’ll cut extensively, and everyone should be out of the city in the following half hour. Be ready for the cold — it will be very invigorating. Please get your masks on, and check your seal, and the seal of the people around you.”
He looked down at Nadia, who had gotten a little laser welder out of her black backpack, and now showed it to Nirgalrholding it overhead so that much of the crowd could see it.
“Is everyone ready?” Nirgal asked over his loudspeaker. Everyone visible in the crowd had a white mask over their lower faces. “You look like bandits,” Nirgal told them, and laughed. “Okay!” he said, looking down at Nadia.
And she cut the tent.
Sensible survival behavior is almost as contagious as panic, and the evacuation was quick and orderly. Nadia cut about two hundred meters of tenting, right above the concrete coping, and the higher air pressure inside caused an outflowing wind that held the transparent layers of the tent fabric up and out from the coping, so that people could climb over the waist-high wall without having to deal with it. Others cut the tent near West and South gates, and in about the time it takes to empty a big stadium, the population of Burroughs was out of the city, and into the cold fresh air of an Isidis mo
rning: pressure 350 millibars, temperature 261K°, or –12° Celsius.
Zeyk’s Arabs stayed in their rovers and served as escorts, rolling back and forth and guiding people up to the line of hillocks a few kilometers to the southwest of the city, called the Moeris Hills. Floodwater reached the eastern side of the city as the last part of the crowd made it onto this line of low bumps in the plain, and Red observers, ranging wide in rovers of their own, reported that the flood was now running north and south around the foot of the city wall, in a surge that at this point was less than a meter deep.
So it had been a very, very close thing; close enough to make Nadia shudder. She stood on the top of one of the Moeris hillocks, looking about trying to gauge the situation. People had done their best, but were insufficiently dressed, she thought; not everyone had insulated boots, and very few people had much in the way of headgear. The Arabs were leaning out of their rovers to show people how to wrap scarves or towels or extra jackets over their heads in improvised burnoose hoods, and that would have to do. But it was cold out, very cold despite the sun and the lack of wind, and the citizens of Burroughs who did not work on the surface were looking shocked. Although some were in better shape than others; Nadia could spot Russian newcomers by their warm hats, brought from home; she greeted these people in Russian, and almost always they grinned — “This is nothing,” they shouted, “this is good ice-skating weather, da?” “Keep moving,” Nadia said to them and to everyone else. “Keep moving.” It was supposed to warm up in the afternoon, perhaps up to freezing.
Inside the doomed city the mesas stood stark and dramatic in the morning light, like a titanic museum of cathedrals, the banks of windows inlaid in them like jewels, the foliage on the mesa tops little green gardens capping the redrock. The city’s population stood on the plain, masked like bandits or hay fever victims, bundled thickly in clothes, some in slim heated walkers, a few carrying helmets for use later if needed; the whole pilgrimage standing and looking back at the city: people on the surface of Mars, their-faces exposed to the frigid thin air, standing hands in their pockets, above them high cirrus clouds like metal shavings plastered against the -dark pink sky. The strangeness of the sight was both exhilarating and terrifying, and Nadia walked up and down the line of knobs talking with Zeyk, Sax, Nirgal, Jackie, Art. She even sent another message to Ann, hoping that Ann was receiving them, even though she never answered: “Make sure the security troops have no trouble at the spaceport,” she said, unable to keep the anger out of her voice. “Keep out of their way.”
About ten minutes later her wrist beeped. “I know,” Ann’s voice said curtly. And that was all.
Now that they were out of the city, Maya was feeling buoyant. “Let’s start walking,” she cried. “It’s a long way to Libya Station, and half the day is almost gone already!”
“True,” Nadia said. And many people had already started, heading over to the piste that ran out of Burroughs South Station, and following it south, up the slope of the Great Escarpment.
So they walked away from the city. Nadia often stopped to encourage people, and so quite often she was looking back at Burroughs, at the rooftops and gardens under the transparent bubble of the tent, in the midday sunlight — down into that green meso-cosm that for so long had been the capital of their world. Now rusty black ice-flecked water had run almost all the way around the city wall, and a thick flow of dirty icebergs was coming down from the low crease to the northeast, pouring toward the city in a broadening torrent, filling the air with a roar that raised the hair on the back of her neck, a Marineris rumbling…
The land they walked over was dotted by scattered low plants, mostly tundra moss and alpine flowers, with occasional stands of ice cactus like spiky black fire hydrants. Midges and flies, disturbed by the strange invasion, whirred around in the air overhead. It was noticeably warmer than it had been in the morning, the temperatures rising fast; it felt a little above zero. “Two seventy-two!” Nirgal cried when Nadia asked him in passing. He was passing by every few minutes, running up and down the crowd from one end of the line to the other and back again. Nadia checked her wrist: 272°K. The wind was very slight, and from the southwest. The weather reports indicated the high-pressure zone would stay over Isidis for another day at least.
People were walking in small knots, in the process of finding other small knots, so that friends and work groups and acquaintances were greeting each other as they moved along, surprised often by familiar voices under masks, familiar eyes between mask and hood or hat. A diffuse frost cloud rose from the crowd, a mass exhalation, burning off quickly in the sun. Rovers from the Red army had driven up from both sides of the city, hurrying to get away from the flood; now they moved along slowly, their outriders passing out flasks of hot drinks. Nadia glared at them, mouthing silent curses inside the privacy of her mask, but one of the Reds saw the curse in her eyes, and said to her irritably, “It wasn’t us broke the dike, you know, it was the Marsfirst guerrillas. It was Kasei!”
And he drove on.
A convention was being established whereby ravines to the east of the piste were being used as latrines. They were getting far enough upslope that people often stopped to look back down into the strangely empty city, with its new moat of dark rusty ice-choked water. Groups of natives were chanting bits of the aer-ophany as they walked, and hearing it, Nadia’s heart squeezed inside her; she muttered, “Come back out, damn you, Hiroko, please — come back out today.”
She spotted Art, and walked over to his side. He was making a running commentary over the wrist, apparently sending it to a news consortium on Earth. “Oh yes,” he said in a quick aside when Nadia asked him about it. “We’re live. Real good vid too, I’m sure. And they can relate to the flood scenario.”
No doubt. The city with its mesas, surrounded now by black ice-choked water, which was steaming faintly, its surface turbulent, its edges bubbling madly with carbonation, as waves surged down from the north, the noise like waves in a high storm… The air temperature was now just above freezing, and the surging water was staying liquid even when it pooled and went still, even when it was covered with floating brash ice. Nadia had never seen anything that brought home to her more strongly the fact that they had transformed the atmosphere — not the plants, nor the bluing of the sky color, nor even their ability to expose their eyes, and breathe through thin masks. The sight of water freezing during the Marineris deluge — going from black to white in twenty seconds or less — had marked her more deeply than she knew. Now they had open water. The low broad crease holding Burroughs looked like a gargantuan Bay of Fundy, with the tide racing up it.
People were exclaiming, their voices filling the thin air like bird-song, over the low continuo of the flood. Nadia didn’t know why; then she saw — there was movement at the spaceport.
The spaceport was located on a broad plateau to the northwest of the city, and at their height on the slope, the population of Burroughs could stand there and watch while the great doors of the spaceport’s largest hangar opened, and five giant space planes rolled out one after another: an ominous, somehow military sight. The planes taxied up to the spaceport’s main terminal, and jetways extended and latched on to their sides. Again nothing happened, and the refugees walked up toward the first real hills of the Great Escarpment for the better part of an hour, until, despite their increase in elevation, the spaceport runways and the lower halves of the hangars were under the watery horizon. The sun was well in the west now.
Attention turned to the city itself, as the water broached the tent wall on the east side of Burroughs, and ran in over the coping by Southwest Gate, where they had cut the tent. Soon thereafter it was flooding Princess Park and Canal Park and the Niederdorf, dividing the city in two and then slowly rising up the side boulevards, covering the roofs in the lower part of town.
In the midst of this spectacle one of the big jets appeared in the sky over the plateau, looking much too slow to fly, as big planes low to the ground always d
o. It had taken off southward, so for the spectators on the ground it grew larger and larger without ever seeming to gain speed, until the low rumble of its eight engines reached them, and it plowed overhead with the slow impossible awkwardness of a bumblebee. As it lumbered off to the west the next one appeared over the spaceport, and headed past the water-floored city and over them, off to the west. And so it went for all five planes, each one looking as unaerodynamic as the last, until the last one had trolled past them and disappeared over the western horizon.
Now they began to walk in earnest. The fastest walkers took off, making no attempt to stay back with the slower ones; it was important to begin to train people away from Libya Station as soon as possible, and this was understood by all. Trains were on their way to Libya from all over, but Libya Station was small and had only a few sidings, so the choreography of the evacuation was going to be complex.
It was now five in the afternoon, the sun low over the rise of Syrtis, the temperature plummeting past zero, on its way far down. As the faster walkers, mostly natives and the latest immigrants, pressed on ahead, the crowd became a long column. The people in rovers reported that it was several kilometers long now, and getting longer all the time. These rovers drove up and down the line, picking people up and sometimes letting others out. All available walkers and helmets were being used. Coyote had appeared on the scene, driving up from the direction of the dike, and seeing his boulder car, Nadia instantly suspected he was behind the broaching of the dike; but after greeting her cheerily over the wrist, and asking how things were going, he drove back toward the city. “Get South Fossa to send a dirigible over the city,” he suggested, “in case anyone was left behind, and is up on the mesa tops. There must be some people in there who slept through the day, and when they wake up they are in for one very big surprise.”
He laughed wildly, but it was a good point, and Art made the call.
Nadia walked along at the back of the column with Maya and Sax and Art, listening to reports as they came in. She got the rovers to drive on the dead piste, to avoid kicking dust into the air. She tried to ignore the fact that she was tired already. It was mostly lack of sleep, rather than muscular exhaustion. But it was going to be a long night. And not only for her. Many people on Mars were entirely city dwellers now, and unused to walking very far at a time. She herself seldom did, though she was often on her feet around construction sites, and did not have a desk job like many of these people. Luckily they were following a piste, and could even walk on its smooth surface if they cared to, between the suspension rails on the edges and the reaction rail running down the middle. Most preferred to stay on the concrete or gravel roads running alongside the piste, however.
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