The climate crisis will create two classes: those who can flee, and those who cannot | Peter Gleick

Nearly 700 million people worldwide live in low coastal zones vulnerable to sea-level rise and coastal storms. That number could reach a billion by 2050

A few years ago, after I gave a talk on water and climate change, I had an Arizona rancher come up and ask me if there would be enough water in the future for their livestock or if they should sell out and move north. This week, I received an email from a retiring doctor, who, acknowledging both their privileged economic situation and the personal nature of the decision, nevertheless asked if it would it be more advantageous/safe to consider moving to coastal Oregon or Washington, rather than staying in southern California" because of rising seas, extreme heat and the growing threat of wildfires. At an Independence Day party this weekend, a couple asked me if they should move from Colorado to Michigan because of growing drought and water shortages in the western US.

Related: My new climate reality? Packing a firebag' so I can flee at the drop of a hat | Michelle Nijhuis