For six weeks Marysville has been sealed off as investigators looked for signs of arson, while forensic teams had the gruesome task of searching for victims among the charred wreckage of homes, businesses and cars.

VOA: standard.2009.03.21

Yeats imagines a kind of active arson in this poem.

叶芝在诗里想象了主动燃火。

耶鲁公开课 - 现代诗歌课程节选