Freddie Mac posted an Economic & Housing Research Insight, Life’s A Beach, that addresses the impact of climate change on residential real estate. It discusses the limitations of our potential responses:

Even with significant and coordinated global action like that outlined at the Paris climate conference, some of the projected impacts of climate change appear to be unavoidable. Governments and private organizations are working on plans to mitigate impacts where possible and to adapt to changes that are inevitable. Many are taking notes from the experience of the Netherlands, which has prospered for centuries despite lying below sea level.

However, the dikes and sea walls used by the Dutch may not solve the problems of South Florida. Florida sits on a substrate of porous limestone that holds Florida’s supply of fresh water. As the sea level rises, it infiltrates the limestone underground and contaminates the freshwater supply. A sea wall might stop storm water surges on the surface, but it can’t prevent the underground incursion of salt water.

While technical solutions may stave off some of the worst effects of climate change, rising sea levels and spreading flood plains nonetheless appear likely to destroy billions of dollars in property and to displace millions of people. The economic losses and social disruption may happen gradually, but they are likely to be greater in total than those experienced in the housing crisis and Great Recession. That recent experience illustrated the difficulty of allocating losses between homeowners, lenders, servicers, insurers, investors, and taxpayers in general. The delays in resolving these differences at times exacerbated the losses. Similar challenges will face the nation in dealing with the impact of climate change. (5-6)

The report also highlights a bunch of concrete problems that homeowners and taxpayers will need to confront as climate change wreaks greater havoc:

• Will the federal government continue to subsidize flood insurance?
• Will property values in flood zones drop over time?
• Will climate change increase social dislocation as the landscape of coastal areas is permanently altered by rising sea levels?

The federal government has dropped the ball in taking a leadership role in this area and many states have done so as well. It will likely take a tragedy (likely to be a preventable one) to get them to focus on this in any meaningful way.