Let The Ants Try

Let the Ants Try by Frederik Pohl - Dr. Salva Gordy looked at the radioactive smear that had been Detroit. Then he looked down at the boiling anthill. Why not, he thought excitedly, why not?...
Gordy survived the Three-Hour War, even though Detroit didn't; he was on his way to Washington, with his blueprints and models in his bag, when the bombs struck.
He had left his wife behind in the city, and not even a trace of her body was ever found. The children, of course, weren't as lucky as that. Their summer camp was less than twenty miles away, and unfortunately in the direction of the prevailing wind. But they were not in any pain until the last few days of the month they had left to live. Gordy managed to fight his way back through the snarled, frantic airline controls to them. Even though he knew they would certainly die of radiation sickness, and they suspected it, there was still a whole blessed week of companionship before the pain got too bad.
That was about all the companionship Gordy had for the whole year of 1960.
He came back to Detroit, as soon as the radioactivity had died down; he had nowhere else to go. He found a house on the outskirts of the city, and tried to locate someone to buy it from. But the Emergency Administration laughed at him. "Move in, if you're crazy enough to stay."
When Gordy thought about it all, it occurred to him that he was in a sort of state of shock. His fine, trained mind almost stopped functioning. He ate and slept, and when it grew cold he shivered and built fires, and that was all. The War Department wrote him two or three times, and finally a government man came around to ask what had happened to the things that Gordy had promised to bring to Washington. But he looked queerly at the pink, hairless mice that fed unmolested in the filthy kitchen, and he stood a careful distance away from Gordy's hairy face and torn clothes.