The rain keeps pounding down on the camp, and the creek out in front of the boxcars begins to swell.
Rose of Sharon is feverish and sick.
Pa convinces a bunch of men to help him dig troughs to keep the creek's water from rising. They dig tirelessly.
Rose of Sharon goes into labor, and Ma and Mrs. Wainwright help her through her contractions.
The men outside continue to dig away, but a big cottonwood tree is swept up by the creek-turned-mini-raging-river, and it floats downstream. The tree gets stuck a little ways down, making the water rise even faster.
The men are freaked out by the flood, and they are also freaked out by Rose of Sharon's ear-piercing screams.
Eventually, the ear-piercing screaming stops. Pa goes inside the boxcar to check out the situation.
Mrs. Wainwright shows Pa the blue corpse of a baby.