Sioux County, Nebraska: hazard history

FEMA declared 14 disasters that named Sioux County between 1991 and 2026.

Most recent declarations

• FM-5637 2026 · Fire · South Fork Fire
• DR-4786 2024 · Severe Storm · Severe Winter Storm And Straight-line Winds
• DR-4521 2020 · Biological · Covid-19 Pandemic
• EM-3483 2020 · Biological · Covid-19
• DR-4420 2019 · Flood · Severe Winter Storm, Straight-line Winds, And Flooding
• DR-4325 2017 · Severe Storm · Severe Storms, Tornadoes, And Straight-line Winds
• DR-4225 2015 · Severe Storm · Severe Storms, Tornadoes, Straight-line Winds, And Flooding
• DR-4156 2013 · Severe Storm · Severe Storms, Winter Storms, Tornadoes And Flooding
• FM-5009 2012 · Fire · Region 23 Fire Complex
• DR-1924 2010 · Severe Storm · Severe Storms And Flooding

Not counted above: 11 statewide declarations, which covered every county in Nebraska. A declaration is a decision to send federal help, not a measure of how bad an event was. Records run from 1953. Source: FEMA OpenFEMA Disaster Declarations Summaries.

Records start in 1996. Damage is NOAA's estimate at the time, in nominal dollars, and is often rounded; it is not insurance claims data. A storm that crossed two NOAA zones in this county is recorded, and counted, once per zone.

NOAA storm event records in Sioux County each year. The busiest year was 2010, with 43 records.

Years with no record are left out of the table, not shown as zero.

Costliest records

1. Hail · Jun 4, 1999$20K
   NOAA name: SIOUX · NOAA record 5703535
2. Hail · Jun 7, 2010$12K
   NOAA name: SIOUX · NOAA record 228534
3. Blizzard · Feb 25, 1998$10K
   NOAA name: SIOUX · NOAA record 5630920
4. Hail · Jun 4, 1999$10K
   NOAA name: SIOUX · NOAA record 5703541
5. Hail · Jul 4, 2001$10K
   NOAA name: SIOUX · NOAA record 5258028

Each line is one NOAA record, linked to its page at NOAA. One large storm can appear more than once if NOAA recorded it in several zones of this county. Dollars are nominal.

No National Flood Insurance Program claims are on record for Sioux County.

A count of claims, not a rate: NFIP publishes no count of insured homes beside it, and most flood damage is uninsured. Nominal dollars. Records run from 1978 to 2024; claims filed without a county code are not on any county page. Source: FEMA OpenFEMA FIMA NFIP Redacted Claims.

A hazard vulnerability analysis rates each hazard for probability, impact, preparedness and response. Probability is the one column the county’s federal record can fill — NCEI storm events from 1996 to 2026 and FEMA declarations naming the county — and this is what it says for a facility here, on the 0–3 scale of the all-hazards structure surveyors expect. The other six columns are the facility’s own judgment about its building, and Calchis leaves them blank.

A dash means the record does not speak to that hazard; it is not a zero. Whether a finished document satisfies the CMS Emergency Preparedness Rule is the facility’s finding and its surveyor’s. Complete the HVA for a facility in Sioux County — the technological, human and hazardous-materials rows, the six facility columns, the approval and the printed document — or read the sample analysis on that page first.

• Every figure is counted from public federal records held by Calchis: NOAA NCEI Storm Events, FEMA OpenFEMA Disaster Declarations, and FEMA NFIP claims. Nothing is modeled or estimated.
• NOAA files some events by county and others by forecast zone, and names both. Records are counted as Sioux County when their NOAA name is this county's name, alone or with a word like “Coastal” or “Inland” in front. The county codes NOAA also publishes have not been loaded for Nebraska yet; when they are, this page will count by code instead, and some counties' records will grow. NOAA names counted here: NORTH SIOUX, SIOUX, SOUTH SIOUX. Zones named for something else, such as a mountain range or two counties at once, are left out: 0% of Nebraska's NOAA records.
• Counts last rebuilt from the source records on Sep 15, 2026.