Commercial operations come to an immediate standstill when sewer water floods the property. Cautious business owners can take steps to prevent sewer backups and respond prudently in the event a backup occurs.
Flooding and Sewage Backups: Safety Tips

Flooding and sewage backups fall in the “unpleasant surprise” category. Despite forms of prevention such as keeping sewer drains clear, and installing battery back-ups for your sump pump, water and sewer drain damage can still occur. In the back of every party planner’s mind lurks the fear that water will flood the venue or the sewers will back up just as the party starts.