If your building is being closed due to the damage from the fire to the res of the building then you are being "constructively evicted" from your apartment.  That opens a whole host of issues for the landlord with regard to your lease, which could be seen as void.  You need to read your lease here and yes, you should negotiate the moving expenses, although I would check with an attorney in your state or a tenant's association as to your "right" to receive them.  Your being forced to move only gives you certain rights as to your lease and not necessarily a right to receive money for inconvenience to you.  Good luck.