Be prepared for sewer backups.
When rivers rise, pipes carrying treated sewage
back up. In fact, river or creek water can flow
back into sewer pipes, causing the contents of the
pipes to flow backward into toilets and out into
One option for avoiding backups is to install shut-off valves that prevent sewage and water from back flowing onto the property. Before installing a shut-off valve, always obtain the appropriate permission and permits to retrofit the plumbing.