Hidden Dangers Navigating Climate Risks in CMBS

One of the most crucial components of investing in commercial mortgage-backed securities (CMBS) is assessing the underlying collateral value. But what if investors are disregarding risks that threaten a property’s very existence?

By integrating environmental, social and governance (ESG) considerations in their routine credit analysis, investors can better assess CMBS risks. Of course, the lion’s share of risk to commercial properties comes from natural hazards, including severe weather events exacerbated by climate change. That’s not surprising, but investors may be surprised by the limitations of insurance in reducing these risks.

Insurance Isn’t Enough

Whether caused by earthquakes, hurricanes, tornadoes, wildfires, floods or severe winter storms, the main dangers to CMBS are permanent property damage, which insurance may not cover, and business interruption, which impairs cash flow from tenants. Overall losses can be substantial. Even when a property is insured, total losses for catastrophes almost always exceed insured losses (Display).


Even though many commercial properties must carry hazard insurance in FEMA-designated flood zones, insurance isn’t enough. That’s because the value of federal flood insurance for commercial properties is usually nominal compared to the value of the property. Supplemental insurance is expensive, so many borrowers self-insure. Plus, recent storms have been more intense and frequent than in the past, and even areas not included in flood zones have suffered severe flood damage.

Flooding from rising sea levels is a concern for coastal areas, but even more so for hurricane-prone coastal regions that may also be in the path of storm surges. For example, when Hurricane Harvey slammed Texas in 2017, damages amounted to $125 billion. Since most of the damage was flood-related and outside of FEMA flood zones, only $30 billion of that damage was insured. Recent storms have shown that weather pattern changes can severely affect even inland areas, and most regions have overlapping concerns, such as the West Coast’s exposure to wildfires, droughts and earthquakes.

The problem is significant—and growing—as climate change drives more frequent and more catastrophic natural disasters. According to the National Oceanic and Atmospheric Administration, 2020 featured 22 separate billion-dollar weather and climate disasters, shattering the previous record of 16.

If property risks are worsening, and hazard insurance isn’t the answer, what is?