Thundley, were you USN?? (I can't recall at the moment). Shipboard & aircraft firefighting, we put out JP5 fires with water only. It can and has been done for years. The foam, which is comprised of animal blood, (and edible), is pretty expensive. It also takes special equipment to facilitate the use of that foam. I went through firefighting school four times. Boot Camp, my first sea tour, my second sea tour and my last sea tour. It's possible, but unlikely that the water caused the rig to capsize. After all, they're designed to weather tropical storms, etc. I'd be willing to wager that it was some mechanical defect that caused it to capsize.