[njarboe]

It looks like an engineering flaw that lets outside water into the vault. “A lot of water went into the start of the tunnel and then it froze to ice, so it was like a glacier when you went in,” The fact that the water froze as it entered is good as that means the vault was still very cold. Likely this has an engineering fix. It would be nice if the article discussed if the vault temp was rising faster than expected and if/when passive cooling would fail in the future. This should be the real worry about vault failure. Sophisticated click bait, really.