The term 'Storm Drain' is a type of SEWER system that is designed to collect and transport rainwater away from populated areas. It is usually made up of a network of pipes, catch basins, and other drainage structures. The term 'SEWER' is a five-letter word that is used to describe the system of pipes and drains that are used to transport wastewater away from populated areas. Storm drains are an important part of the SEWER system, as they help to reduce flooding and protect the environment by preventing pollutants from entering the water supply.