The Shelter Act aims to incentivize homeowners and businesses to invest in disaster mitigation improvements, enhancing the resilience of properties against natural disasters. By providing a tax credit for qualified expenditures, the legislation seeks to alleviate the financial burden on individuals and the government during disaster recovery. The main provisions of the Shelter Act include a nonrefundable personal tax credit equal to 25 percent of eligible disaster mitigation expenses, with a maximum credit of $3,750 for single filers and $7,500 for joint filers.