Answer:
One excerpt from "The Scarlet Ibis" that most foreshadows Doodle's death is the following:
"I began to weep, and the tear-blurred vision in red before me looked very familiar. Doodle! I screamed above the pounding storm and threw my body to the earth above his. For a long time, it seemed forever, I lay there crying, sheltering my fallen scarlet ibis from the heresy of rain."
This passage comes at the end of the story, after Doodle has died and the narrator has found his body. The reference to the "heresy of rain" suggests that Doodle's death is a kind of sacrilege or blasphemy, and the image of the narrator sheltering the bird from the storm is a clear metaphor for his attempts to protect his brother from the harsh realities of the world. The fact that the narrator is crying and that the vision before him is "tear-blurred" also suggests that something tragic has occurred, and the repetition of Doodle's name emphasizes the emotional impact of his death.