Hazard Plain national table b2_starter, release 2026-10 (as of 2026-09-30)
B2-a and B2-b county-level starter per unit and hazard (NRI exposure and loss, Storm Events and PA since the plan).
Files: b2_starter.csv and b2_starter.parquet (62,784 rows). The Parquet file carries this text as key-value metadata (keys hazard_plain.*).

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Columns: unit_id, unit_type, stcofips, prefix, hazard, applicable, inherited_from, exp_b, exp_a, exposed_population, eal_b, eal_a, eal_pe, eal_total, eal_pct_buildings, eal_pct_agriculture, headline_metric, headline_value, headline_note, since_date, se_through_date, se_n_county_since_plan, se_n_county_damage_reported, se_damage_since_plan_county, se_n_zone_since_plan, se_n_zone_damage_reported, se_damage_since_plan_zone_reported, pa_basis, pa_since_plan, pa_since_plan_n_declarations, pa_since_plan_n_declarations_with_pa, pa_since_plan_multi_hazard, pa_since_plan_declarations

Sources:
  FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-30, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_Counties.zip, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_CensusTracts.zip
  NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-30, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/
  FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-29T162832Z, pulled 2026-09-30, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries
  FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-29T150754Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries
  FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-29T134039Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses

OpenFEMA disclaimer:
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).