I can give you an idea about the law in CA. If you were working at the time of an accident, you have the right to bring a work. comp. claim. You also have the right to bring a 3rd party action if the person causing the injury does not work for the same co. you work for. So, if the problem which caused the water to leak was to be repaired by your employer, you cannot sue for your injury.(at least in CA). But, if the leak was to be maintained by some outside co., they you would have the right to bring a claim. Once you determine if you have the right to bring the claim, then you have to look at the merit of the case. Did the co. have notice and an opportunity to repair. Or, were they out before and they failed to fix the problem correctly. So, your issues are first are you elibible to bring the claim, and then, does the claim have merit.
My suggestion is to take your case to local counsel and let them give you the skinny. Your consultation will be free and let someone in your area look at the facts and the injury and give you advice.
Good luck.