Each of the four short sections starts with the same word, "Fire," and each time it means something different. First it's the shout in a crowded theatre, a word so dangerous that we can't joke with it. Then it's the military order, where an arm drops and red blossoms spread across whitewashed stone, which suggests an execution. Next, "fire in the hole" is a warning before an explosion, paired with an image of fish leaping frantically after a chemical spill. Last, fire becomes a messenger with no message, only his own "unbearable company."
The speaker sounds alarmed more than angry. The poem doesn't explain or argue; it just lets one word turn from warning to command to catastrophe. The mood is tense and bleak, and the repeated word hits like a drumbeat. By the end, fire seems less like a thing than a presence we can't escape, a language that only says one thing: danger.