Dear Jamestown Tenant:
Your problem may be that the residence you have in a basement may not be a legal residence and that the landlord does not have a residential certificate of occupancy for the basement.
You must check this out. Throughout New York State, most localities do not allow human habitation in the basement portion of a house.
The basement floods the way it does because the main drain from the house to either a municipal sewer or to the septic tank is clogged. A plumber could check this out for you.
But you are better served finding out first if your home is lawful to live in.
The answer provided to you is in the nature of general information. The general proposition being that you should try to avoid a bad outcome if you can.