They COULD have canned you because the Northeast is having its third snowstorm in two weeks. But we're not likely to know it.
Before we walk too much further down this path, how big a company is this? Roughly how many employees.
Two things I am tired of typing: 1.) A wrongful termination does not mean that you were fired for something you didn't do; it means that you were fired for a reason prohibited by law. 2.) The above answer, whatever it is, assumes that no legally binding contract or CBA expressly says otherwise. If it does, the terms of the contract apply.