"Uck!" Lise said. "God, it stinks!"

The evacuation must have been hurried. In many of the apartments that opened onto this hallway—more like cells, with their small high windows and cubicle bathrooms—food had been left to rot, toilets had been abandoned unflushed. They set about finding the most presentable first-floor residences and settled on three spaces, two adjoining and one cross-hall, from which the previous residents had removed the most obvious perishables. Lise reached up to swing open a window, but Dvali said, "No, not with the dust coming. We'll have to live with the stench."

There was no electricity, and the light was fading fast. Turk and Dvali unloaded their gear from the car, by which time the afternoon had turned into a smudgy twilight and the ash had begun to fall like snow.

Dvali said, "Where are the others?"

"I could go hurry them up," Turk offered.

"No… they know where to find us."

* * * * *

Diane and Sulean Moi left Mrs. Rebka in the car with Isaac while they scrounged for groceries. The store had been nearly stripped, but in a stockroom in the back they discovered a few boxes of canned soups, not especially appetizing but possibly vital if the storm locked them indoors for any length of time.

They ferried a few of these cartons out to the vehicle as the sky darkened. "One more box," Diane said at last, assessing the oncoming ash cloud, "and then we should get under cover."

A skylight above the aisles of the grocery store cast pale illumination on the empty shelves, some of which had been tumbled down by a previous tremor. Diane and Sulean each picked up a final carton and headed for the door, feet crunching on glass and litter.

As soon they reached the sidewalk they heard Isaac's screams. Diane dropped her carton instantly, spilling cans of creamed this-and-that down the sidewalk, and yanked open the passenger-side door and then craned her head back. "Help me!"

The boy's screaming was interrupted only by gasps for breath, and Diane couldn't help thinking that it must hurt simply to make such a noise, that a child's lungs shouldn't be capable of this awful sound. He thrashed and kicked and she grabbed his wrists and pinned them, which required more strength than she would have imagined. Mrs. Rebka was up front, fumbling the keycard into its slot. "He just started screaming—I can't calm him down!"

The important thing now was to get under shelter. "Start the car," Diane said.

"I tried! It won't!"

Now the storm was on top of them: not just a few ominous dust-flakes anymore but a roiling front that came out of the desert with shocking speed and solidity. It broke before Diane could say another word, and as quick as that they were engulfed in it, choking in it.

Literally choking. She gagged, and even Isaac fell silent as soon as he drew a deep breath full of the dust.