Get Hazard Mitigation Assistance (HMA) Project Details — get_hazard_mitigation

Retrieves Hazard Mitigation Assistance project data from both the legacy HMA Projects dataset and the newer FEMA GO subapplications dataset, harmonized at the project-county level.

Usage

get_hazard_mitigation_assistance(
  file_path_old_grant_system = file.path(get_box_path(), "hazards", "fema",
    "hazard-mitigation-assistance", "raw",
    "HazardMitigationAssistanceProjects_2025_09_27.parquet"),
  file_path_new_grant_system = file.path(get_box_path(), "hazards", "fema",
    "hazard-mitigation-assistance", "raw", "HmaSubapplications_2025_09_27.parquet"),
  state_abbreviations = NULL
)

Arguments

file_path_old_grant_system: The file path to raw data for HMA applications from the older grant-reporting system. These data are typically available from: https://www.fema.gov/openfema-data-page/hazard-mitigation-assistance-projects-v4
file_path_new_grant_system: The file path to raw data for HMA applications from the newer (FEMA GO) grant-reporting system. These data are typically available from: https://www.fema.gov/openfema-data-page/hma-subapplications-v2
state_abbreviations: NULL by default, in which case data are returned for all 51 states. Provide a vector of two-character USPS state abbreviations to obtain data for a sub-selection of states.

Value

A dataframe of project-county HMA application data. Only project_cost_federal_split should be used for county-level aggregations. Columns include:

data_source: "hma-projects" (legacy) or "hma-subapplications" (FEMA GO).
project_id: Unique project identifier.
disaster_number: FEMA disaster number (if disaster-related).
project_program_area: HMA program: HMGP, BRIC, FMA, or PDM.
project_fiscal_year: Fiscal year of the project.
state_name: Full state name.
county_geoid: Five-digit county FIPS code.
county_population: County population used for allocation.
project_status: Current project status (e.g., "Closed", "Active").
project_cost_federal: Total federal cost at project level.
project_cost_federal_split: Federal cost allocated to this county.

Details

Data are from FEMA's OpenFEMA API, combining two data sources: the legacy Hazard Mitigation Assistance Projects (v4) and the newer HMA Subapplications (v2). Multi-county projects are split across counties based on population proportions.

Examples

if (FALSE) { # \dontrun{
get_hazard_mitigation_assistance()
} # }