The image that popped up on my Twitter feed last week was beyond alarming, it was  surreal: An entire house, a big one, sliding off its foundations and floating slowly down the muddy, swollen Yellowstone River. It was such an unexpected sight, so bizarre, that I could do little more than gawk at it, mutter an expletive and scroll down to the next crazy image of disaster.

But then I read the caption, and that stopped me: This wasn’t just some random building, it was an apartment complex that housed several Yellowstone National Park employees and their families.