The FIREWALL Act aims to encourage homeowners to invest in disaster mitigation improvements to reduce the risk of damage from natural disasters such as wildfires, hurricanes, and floods. By providing a refundable tax credit, the legislation seeks to promote resilience in communities vulnerable to these events. Homeowners can claim 50 percent of their qualified disaster mitigation expenditures, with a maximum credit of $25,000, which may be adjusted based on income and is subject to a phaseout for those earning above $200,000. The Act also allows for inflation adjustments in future years.