The "Answer" depends on the TOTAL Situation.
What was the cause of the flooding? Was it an "Act-of-God" or did the Landlord cause it...or did you?
IF the Landlord is doing the BEST possible under the circumstances to repair the "Situation", it is likely that you have no recourse...just pay the rent.
It is worthwhile to mention, I think, that the Landlord's mortgage payments, if any, continue...whether YOU pay the rent or not.
Landlords are NOT ....."Everybody's Rich Uncle".
Also, whereas in an Apartment Building...your Landlord ( or his custodian ) will clear the sewer line that YOU plugged-up by flushing a disposable diaper down it. That's unlikely when you rent a house. Usually the terms are considerably different.
MANY "Commercial Rental" (other than in a Mall setting), the Tenant is also responsible for ALL Repair and Maintenance.
To stay on good terms with the Landlord.....perhaps you should pay the rent. Otherwise...he might desire to find a way to get you to rent elsewhere.
just "Food for Thought".....
-Junkmanme-