FEMA Hazard Mitigation Grant Program (HMGP) Overview

The FEMA Hazard Mitigation Grant Program (HMGP) provides federal funding to state, tribal, territorial, and local governments to reduce long-term risk from natural hazards following a presidentially declared major disaster. HMGP is authorized under Section 404 of the Robert T. Stafford Disaster Relief and Emergency Assistance Act and represents one of the largest federal mechanisms for pre-disaster risk reduction. Understanding its eligibility rules, funding formula, and competitive structure is essential for communities seeking to prevent future disaster losses. For broader context on federal emergency programs, see the FEMA Authority home resource index.

Definition and Scope

HMGP is a post-disaster mitigation grant administered by FEMA and managed at the state level through the State Hazard Mitigation Officer (SHMO). The program is specifically tied to presidentially declared major disasters — it is not available outside of a formal declaration. Funding is calculated as a percentage of estimated federal disaster recovery costs under the Stafford Act, which means larger disasters generate larger HMGP funding pools.

Under the standard formula, HMGP provides up to 15 percent of total estimated federal assistance for a disaster (FEMA HMGP Program Page). States that have adopted an Enhanced State Hazard Mitigation Plan — a more comprehensive planning document meeting additional FEMA criteria — qualify for up to 20 percent of estimated federal assistance. This distinction creates a direct financial incentive for states to invest in mitigation planning infrastructure.

Eligible applicants include:
- State agencies
- Tribal governments (federally recognized)
- Local governments and municipalities
- Certain private nonprofit organizations that own or operate a critical facility

Individual homeowners and businesses are not direct applicants but may benefit through subgrant projects administered by a local government applicant. The federal cost share is typically 75 percent, with the remaining 25 percent borne by the subgrantee, though in-kind contributions may satisfy part of the non-federal share.

How It Works

HMGP funding flows through a structured, multi-stage process governed by FEMA's Hazard Mitigation Assistance (HMA) unified guidance (FEMA HMA Guidance).

1. Major disaster declaration issued — A presidentially declared major disaster triggers HMGP eligibility. FEMA calculates the funding ceiling based on estimated federal recovery expenditures under Programs 1–3 (Individual Assistance, Public Assistance, and HMGP itself).
2. State administers the program — The SHMO announces the funding availability, establishes application priorities, and ranks submitted proposals against the state's approved Hazard Mitigation Plan.
3. Subapplicants develop project applications — Local governments, tribes, and eligible nonprofits submit project proposals to the SHMO identifying hazard type, affected area, proposed activity, benefit-cost ratio analysis, and engineering feasibility.
4. Benefit-Cost Analysis (BCA) review — FEMA requires that funded projects demonstrate a benefit-cost ratio of at least 1.0, meaning the present value of avoided future losses must equal or exceed project costs. FEMA provides its own BCA Toolkit software for this calculation.
5. FEMA regional review and obligation — The SHMO submits prioritized subapplications to the FEMA Regional Administrator, who reviews and obligates funds. The relevant FEMA region's role is detailed at FEMA Regions Map and Responsibilities.
6. Project implementation and closeout — Subgrantees implement approved projects within the performance period, typically 36 months, with progress reporting requirements.

HMGP operates under a competitive structure within each state. The SHMO is not required to fund all eligible projects — it allocates available dollars across ranked subapplications until the funding ceiling is exhausted.

Common Scenarios

HMGP funds a wide range of physical and planning mitigation activities. The five most common project types funded under the program include:

• Residential property acquisition and demolition — Purchasing flood-prone properties, demolishing structures, and converting land to open space. Acquired land must remain open space in perpetuity under a recorded deed restriction.
• Elevation of structures — Raising existing buildings, especially single-family homes, above the Base Flood Elevation (BFE) shown on FEMA flood maps and Flood Insurance Rate Maps (FIRMs).
• Wind retrofits and safe rooms — Installing community or residential safe rooms designed to withstand tornado and hurricane-force winds meeting FEMA P-361 or P-320 standards.
• Drainage and stormwater improvements — Culvert replacement, detention basin construction, and channel modification projects that reduce flood risk to adjacent structures.
• Mitigation planning — Development or update of Local Hazard Mitigation Plans, which are a prerequisite for a jurisdiction to receive any HMGP project funds.

HMGP differs meaningfully from the FEMA Building Resilient Infrastructure and Communities (BRIC) program, which is a pre-disaster mitigation grant not tied to a disaster declaration. BRIC draws from a national competition pool funded by an annual set-aside, while HMGP pools are disaster-specific and administered state by state.

Decision Boundaries

Several threshold conditions determine whether a community can access HMGP funds or whether a specific project will be approved.

Eligibility conditions that must all be met:
- The jurisdiction must be located within a presidentially declared major disaster area, or the state must include the jurisdiction within its HMGP application scope.
- The jurisdiction must have a FEMA-approved Local Hazard Mitigation Plan in effect at the time of project application and award.
- The proposed project must address a natural hazard risk identified in the approved hazard mitigation plan.
- The project BCA must meet or exceed the 1.0 threshold.

Scope limitations to recognize:
- HMGP does not fund projects that benefit a single private business as the primary purpose.
- Acquisition projects require voluntary participation — FEMA prohibits the use of eminent domain to acquire properties under HMGP.
- Projects must comply with all applicable federal environmental and historic preservation laws under the National Environmental Policy Act (NEPA) and Section 106 of the National Historic Preservation Act before FEMA will obligate funds.

The distinction between HMGP and FEMA Public Assistance is operationally significant: Public Assistance funds the repair and restoration of damaged infrastructure after a disaster, while HMGP funds modifications that prevent or reduce future damage. The two programs are often active simultaneously within the same disaster declaration, but their eligible costs, cost-share structures, and administrative pathways are entirely separate.

States with enhanced mitigation plans gain a measurable funding advantage — the 20 percent calculation tier versus the standard 15 percent can represent tens of millions of dollars in additional grant authority for a large-scale disaster, creating a strong structural rationale for states to pursue enhanced plan status even before a disaster occurs.