Storms can damage outdoor swimming pools by filling them with debris. After a storm, it is important to first remove all debris and replace the pool water. Next, the water chemistry must be maintained by balancing alkalinity between 80-120 ppm and shocking the water with chlorine to kill contaminants. Finally, the pool walls and floor must be cleaned by vacuuming dirt and debris while the water is emptied. Hiring a pool professional can help in thoroughly cleaning the pool after a storm.