Reading the poem, one will have difficulty finding a rhythm, though the lines are all 10 syllables and in rhyming couplets. Seth also utilizes enjambment, which is the continuation of a verse beyond the line break. Since the poem is about the destruction of Hiroshima on August 6, 1945, and the speaker's experience in its aftermath, the reader can feel the chaos and confusion that the speaker feels as he attempts to ascertain what has happened through the confusing rhythm.
The poem is also written in a conversational style, which would almost seem to make the speaker appear calm but for the interesting use of dashes. For instance, the speaker comments:
The roof, the walls and, as it seemed, the world
Collapsed in timber and debris, dust swirled
Around me—in the garden now—and, weird,
My drawers and undershirt had disappeared. (7-10)
The dash sets up the speaker's pause in noticing that the destruction is not just centered in his house, but it's what occurs after the dash that is intriguing: he notices that his clothes have disappeared, though he does not seem to show surprise. The clause is not punctuated with an exclamation point as one might expect; it is stated almost nonchalantly.