How does the setting of "The Scarlet Ibis" create a mood that foreshadows events in the story?
When we think of the setting, we need to remember that the climax of this unforgettable short story occurs in 1918, the year that World War I ended. This is very important for a number of reasons. Chiefly, Hurst seems to be drawing our attention as to how the war raging in Europe between "brothers" is related to the external conflict occurring between Doodle and his brother. As the war impinges more and more upon the reality of Doodle and his brother, so the narrator's desire to shape and form Doodle into somebody that he is not intensifies and reaches the horrific climax we are presented with at the end of the story. Consider how the war comes to bear on them more and more:
And during that summer, strange names were heard through the house: Chateau-Thierry, Amiens, Soissons, and in her blessing at the supper table, Mama once said, "And bless the Pearsons, whose boy Joe was lost in Belleau Wood."
Clearly even in their location in the States war is reaching and changing the lives of Doodle and his brother.
Thus, these details of setting create a morose, depressing mood that reflects the impact of the war on all aspects of society and the lives of Doodle and the narrator. This in turn foreshadows the conflict between the narrator and Doodle as the narrator struggles and pressurises Doodle to become somebody that he is unable to be, and his ultimate death.