In "The Storm," the people and the world around them are experiencing the same brief, exciting, and dangerous event: the storm. Calixta and Alcée experience it differently than the others; for them, the storm heightens the danger and excitement of their adultery. When the storm is over, the natural world recovers. Similarly, when the lovers are finished, they part ways and return to their spouses.
The storm mirrors Alcée and Calixta's affair: both are brief, intense, and dangerous in their own ways, but neither involves any permanent damage.