Maybe...and this is the worst read, albeit what you lost is PROPERTY, not $$, right?
You were just informed that 75% of your property is gone, but you can have the 25%-that would be the "best" read, but i am not sure if it is possible to interpret it like this.
I think of it like this: if you would have had 100% and sold it, you would have to pay capital gains tax on 100%. Since you didn't pay that tax, I don't think it can be a tax deduction.