You’d think that, given how dangerously low Lake Mead is getting, we’d have a good idea of what life might look like without that water.

Yet few major players are modeling for a future without Colorado River water – or even a future in which we are asked to live on markedly less of it.

Ironically, the deeper the lake plunges, the more reluctant water managers seem to be about fleshing out the worst-case scenario.