Major Colorado River cuts must be made, one way or another. The only looming questions are when and on what terms, with negotiators scheduled to resume interstate meetings this week.

The Colorado River remains in an unfolding and worsening crisis. Demand far exceeds supply. Long-term drought, worsened by climate change, has meant less water refilling the river’s large reservoirs as water users have continued to overtap them. Lake Mead, outside of Las Vegas, is the grim evidence, where, at 27 percent full, old boats have washed ashore in what can feel like an apocalyptic scene. The math is unavoidable: Without cuts, the reservoir will keep dropping.