Climate change is increasingly threatening the economic stability of households in the UK, particularly through the risk of flooding. Recent estimates indicate that 6.3 million properties are currently at risk, with projections suggesting this could rise to 8 million by 2050. Homeowners in flood-prone areas may face rising insurance premiums, declining property values, and potential difficulties in selling or remortgaging their homes. This situation could lead to the emergence of 'climate mortgage prisoners,' with an estimated 430,000 homes at risk of becoming financially unattractive to lenders. The implications are particularly severe for lower-income households, who may lack the resources to relocate to safer areas, thereby widening wealth inequality. To mitigate these risks, the UK government must take proactive measures, including stricter regulations on new developments in high-risk areas and improved flood defenses. As the current initiative to ensure affordable flood insurance is set to conclude in 2039, timely action is critical to safeguard household finances and prevent a crisis similar to that faced by New Orleans.