What piece of evidence best supports the idea that the city in "There Will Come Soft Rains" was ruined from some sort of nuclear blast?
Bradbury tells us that the deserted house in the story stands alone in a city of rubble and ashes. This is our first real clue that what's left of Allendale, California, in 2026, is the remnant of a nuclear blast. Although the city may have been destroyed as part of a conventional war, the fact that just one house is left standing indicates that something a good deal more cataclysmic took place here.
Our initial suspicions are confirmed in the very next sentence when we're informed that, at night, the ruined city gives off a radioactive glow that can be seen for miles. Now we're certain that the city wasn't just destroyed by war; it was annihilated by some kind of nuclear blast.
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