How could rising sea level impact the National Flood Insurance Program?

Source: Science Daily

Insurance policy premiums from the National Flood Insurance Program (NFIP) allow policyholders to maintain a lower, grandfathered rate even when the risk escalates. But as coastal flooding increases due to rising sea level and more intense storms, new research suggests this grandfathered policy could lead to big losses for the NFIP.

https://www.sciencedaily.com/releases/2021/02/210225113237.htm