If you were precluded from occupying the leased premises, you rent should be abated for that period of time. If you are unable to resolve the matter amicably with your landlord, I suggest you discuss this matter with an attorney. Good luck.
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I disagree with counsel.. The LL did not prevent you from occupying the apt. Also your stuff was in the apt. Check your lease. Does it have an act of God clause - that the LL is not responsible for acts beyond his/her control? If so you are clearly out of luck.