Hazard Plain national table b1d_hazard_summary, release 2026-10 (as of 2026-09-30)
B1-d per-hazard summary per unit, with explicit no-recorded-events rows.
Files: b1d_hazard_summary.csv and b1d_hazard_summary.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, approval_date, n_events_full, n_events_since_plan, n_events_review_window, n_events_5y, n_decl_full, n_decl_since_plan, period_first_year, period_end_date, period_text, no_events_statement, partial_note

Sources:
  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 HazardMitigationPlanStatuses v1, version 2026-09-29T134039Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses

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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).