A sewer backup occurs when wastewater from the sewer system flows back into homes or buildings instead of being properly drained away. This can happen due to blockages, such as tree roots, debris, or grease buildup in the pipes. When the sewer lines become overwhelmed, the pressure can force sewage to escape through drains, toilets, or floor drains. Sewer backups can lead to serious health risks and property damage. The contaminated water can carry harmful bacteria and pathogens, making it essential to address the issue promptly. Homeowners should be aware of the signs of a backup, such as slow drains or unusual odors, and contact a professional for assistance.