When home insurance vanishes, can your mortgage survive?
The mechanics are straightforward. Homeowners insurance is a standard condition of mortgage approval in the United States. When a borrower loses coverage – or cannot obtain it at all – lenders typically force-place a policy at the borrower’s expense, often at significantly higher cost. As climate risk reshapes insurance availability across American lending markets, that backstop becomes increasingly strained.
Numbers that aren’t what they appear
One of the more striking passages in the memo concerns how risk data is being handled inside the industry itself. Natural catastrophe modelers and actuaries, the group says, are being pressured to “manage down the numbers” – softening projections of future physical risk to preserve deal flow and avoid alarming clients.
“Modelling adjustments are frequently constrained by commercial considerations, particularly where higher estimates of future physical risk could result in reduced profitability or loss of market share,” the memo states.
That gap between what the models show and what is communicated externally creates a specific problem for mortgage lenders: if insurance availability contracts faster than expected because underlying risk was understated, the implications for collateral values and loan portfolios can be severe and rapid. The growing exposure of the US housing market to climate-related financial risk is a topic mortgage professionals are increasingly grappling with – and this memo suggests the data underpinning those conversations may be less reliable than assumed.
Which markets are most exposed?
The communities at greatest risk, the memo identifies, include coastal and mountainous areas, flood and wildfire zones, and regions susceptible to subsidence. In the United States, that description covers substantial portions of the mortgage markets in California, Florida, Texas, Louisiana, and the Carolinas.
