Ouch, that sucks. 30 gallons? Man, that's a lot of mead!!!!
Yeah, not sure how to save that if it did get tainted. But if water got in it, it'll most likely ferment from the natural yeasts in honey anyway. So, making some honey wine would naturally be the best option since It'll go bad anyway. Unless someone has a better answer. Personally I'd make a ton of mead, but that's why I got into beekeeping in the first place anyway.
Sean Kelly