If you own your land, and your land becomes unlivable because of climate change... how do you move? Very few people have enough liquid cash on hand to purchase

If you own your land, and your land becomes unlivable because of climate change... how do you move? Very few people have enough liquid cash on hand to purchase a new home without first selling their existing home. If the value of the existing home suddenly goes to zero, essentially those people become refugees. And generally speaking, refugees are not welcome when everyone else feels stressed too. This aspect of climate change--the long-term effect of destroyed property value--is, I think, underappreciated by a lot of people.