In the book "Isaac's Storm," the protagonist, Isaac, experiences a sense of fear as he listens to the sound of deep-ocean swells crashing onto the beach. This dramatic sound is a stark contrast to the usually calm Gulf waters, which are typically serene and gentle. The peaceful surf that once softly erodes the sand has transformed, as the swells began to manifest on Friday, growing louder and more intense.

This increase in noise symbolizes the brewing storm, with each booming sound signaling the impending danger. Isaac's trepidation reflects the ominous nature of the ocean’s power, foreshadowing the devastating hurricane that is about to strike. The contrasting imagery of a tranquil sea becoming tumultuous serves to heighten the sense of urgency and foreboding that permeates the narrative.