The best example of figurative language in the excerpt of "Good Country People" can be found in:
"If she don’t get there before the dust settles, you can bet she’s dead, that’s all."
The author used a figure of speech called hyperbole, which is a deliberate exaggeration used in order to express intensity and effect. The character expresses her concern by emphasizing how serious it will be if her daughter doesn't arrive at a certain place before the dust settles. "...you can bet she's dead"- she says. Pure exaggeration, typical of overly protective parents.