This bill aims to significantly increase federal financial support for fire management assistance by amending the Robert T. Stafford Disaster Relief and Emergency Assistance Act. It establishes a Federal share of not less than 75 percent for eligible fire management costs, which will apply to amounts appropriated on or after the date of enactment. The legislation further mandates that the Administrator of the Federal Emergency Management Agency (FEMA) conduct a rulemaking within three years. This rulemaking will develop criteria for recommending an increase in the Federal cost share beyond the 75 percent minimum under specific circumstances. Finally, the bill requires FEMA to update its grant policy to ensure that predeployment of domestic assets by state, local, and tribal governments becomes eligible for reimbursement under fire management assistance, aligning it with other disaster aid provisions.