With more rain in the forecast, some Quincy residents are dreading what's going to happen to their basements again.
For dozens of families living along Curtis Creek, they're not just dealing with water, but sewage backing up in their homes.
Now the city is looking to pinpoint what's wrong, but it may not happen soon enough.
And because of just how many people were dealing with raw sewage in their basements, the city brought in an Outside engineering firm Wednesday to assess the problem and what they found was very unusual.
John Moore and his family has been cleaning out their flooded basement since flash flooding hit the area on Monday.
He says the problem hasn't improved as his basement has been flooded by sewage three more times since Monday.
"Well I'm staying here because I'm cleaning out the basement it seems like every other day, but my wife and children are in a hotel right now," said Moore.
Complaints from Moore and other families are what caused the city to spring into action.
Human Resources Director Doug Olson says an outside engineering firm inspected part of the sewer system around 2 p.m. Wednesday. At that time of day, they expected the sewer line to be about 5% capacity, but Olson says they found it at 50%, and it wasn't just sewage.
"It was all clean water, not gray water (or sewage), which tells us that, there's water coming into the system that probably shouldn't be there, we don't know exactly what that is, we have a suspicion that it may be sump pumps," said Olson.
Olson says possible illegal sump pump drainage combined with heavy rains and construction drainage from Quincy's north side could all be contributing to sewage backing up into homes.
But no matter what the reason, it's something residents like Moore, want to see fixed, and fast.
"I'm glad that they are, it's unfortunate that it took all of this, for them to act on it, I mean we had this problem 30 days ago," said Moore.
Olson says the city will start working immediately Thursday to pinpoint just where and what the problem is and how to solve it.