FEMA Records
22
Above median
South Dakota · FEMA + NOAA + National Risk Index
Sanborn County, SD
22 FEMA disaster declarations (1969-2024), with a FEMA National Risk Index rating of Very Low. Most common hazard: Flood.
- 22
- FEMA declarations
- 19
- Major disasters
- 4
- NRI risk · Very Low
- Flood
- Top hazard
The verdict
Two federal records point in the busier direction for Sanborn County. Its 22 FEMA declarations are 16% above the South Dakota county mean and exceed the count for 57% of the 3,266 counties in this registry. Separately, FEMA's National Risk Index places it safer than 4%, based on modeled expected annual loss, social vulnerability, and community resilience.
- Safer than 4%
- of U.S. counties for FEMA National Risk Index score
- Very Low
- FEMA National Risk Index rating
- 22
- FEMA declarations vs 21 national county avg
- 11
- NFIP flood insurance claims filed
FEMA's National Risk Index and its declaration registry are separate measures. This county's registry includes Major Disaster (DR) and Emergency (EM) records; an EM authorizes a narrower set of federal assistance than a DR.
FEMA OpenFEMA declaration desk
County FIPS 46111 · Sanborn County 22 declarations · rank 1379/3,266
DECL-HEAVY · MAJOR-HEAVY · RANK-LOWER · PHOTO-FINISH · NRI-LOW · ACT-HIGH · TYPE-LEAD · VS-ST-ABOVE
- DECL-HEAVY 22
- MAJOR-HEAVY 86%
- RANK-LOWER #1,379
- PHOTO-FINISH Hardy
- NRI-LOW Very Low
- ACT-HIGH High
- TYPE-LEAD Flood
- VS-ST-ABOVE +16%
Nearest declaration peer: Hardy, WV (0 declaration gap)
FEMA Disaster Declarations Summaries v2 filing stamps for this county register. Read with this county → · South Dakota state profile
Sanborn County in the declaration-count neighbourhood
FEMA declaration records among Sanborn County and nearest peers by total count
- Los Angeles · largest
Los Angeles · largest
88 declarations
- Hardy · near 22
Hardy · near
22 declarations
- Prairie · near 22
Prairie · near
22 declarations
- Sanborn · this county 22
Sanborn · this county
22 declarations
- St. Francis · near 22
St. Francis · near
22 declarations
- Ujelang · smallest 1
Ujelang · smallest
1 declarations
What this shows Sanborn County carries 22 FEMA declaration records, ranked 1379 of 3,266 counties in this registry.
How Sanborn County's FEMA declaration count compares nationally
Sanborn County vs. all counties in this dataset
FEMA disaster declarations, all-time · Sanborn County
22 Top 43% higher than 57% of 3,266 counties
Each bar is a band; taller bars hold more counties. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source FEMA Disaster Declarations Summaries v2 · 2026-08-25
Sanborn County's FEMA Risk Index score
Which hazard drives modeled loss here?
FEMA's modeled annual dollar loss for Sanborn County is led by Riverine Flooding (about $1.3M Expected Annual Loss, Historical Loss Ratio Relatively High), while Wildfire carries the highest National Risk Index rating (Relatively Low). EAL and risk score use different inputs; they need not agree.
Source: FEMA National Risk Index (December 2025 release) - Expected Annual Loss vs composite risk rating by hazard.
What does Sanborn County's hazard record show?
FEMA National Risk Index
This county sits at the very bottom of FEMA's National Risk Index nationally, a composite score of 3.6/100 (rated Very Low). Projected losses are minimal, Expected Annual Loss reads Very Low (roughly $3.8M in annualized losses), and the county's exposure is shaped by a Very Low social-vulnerability profile and Relatively High community resilience. Even the county's top-rated hazard, Wildfire, only reaches Relatively Low on FEMA's scale, none of the 18 modeled hazards stand out here. FEMA's modeled frequency puts that hazard at roughly once every 890 years here.
Reading the federal records together
This county has a small entry in FEMA's NFIP paid-claims table: 11 claims and $43.1K paid in total. PlainHazard calls 1-49 claims a light registry record, a label for this dataset rather than a finding that flood exposure is low. A short claims history can also reflect insurance take-up, the period covered, or losses that were never insured.
The declaration register points in the busier direction. Sanborn County's 22 federal records stand 16% above the South Dakota county mean of 19.0. That comparison describes how often federal action was recorded, including any Major Disaster, Emergency, and Fire Management entries shown on this page; it does not convert the count into future probability.
67 /100
Historical Activity Index
High historical activity
Sanborn County, SD · PlainHazard-derived composite from federal records
This 0–100 index is an explicit PlainHazard composite from FEMA declaration history only on the county surface (this DB has no county-level NOAA damage row) . It is not FEMA's National Risk Index, not a forecast, and not a safety, insurance, or preparedness rating. Open the calculator · Methodology
FEMA Declarations (1953–present) High
16/30
22 OpenFEMA declarations, full ingest window (1.1x national county average)
County Disaster Density High
14/25
22 declarations (1.2x state county average of 19)
Major Disaster Share Very High
22/25
19 of 22 declarations are major disasters (86%)
Hazard Diversity Very High
15/20
6 different disaster types declared in Sanborn County
FEMA NRI 8-hazard radar - Sanborn County
How to read this radar
Each axis: NRI risk rating (Very Low-Very High) on a 0-100 scale. Rounder = broad exposure; spiky = one or two hazards dominate.
Major Disaster share
86%
Mostly major
NRI risk score
4
Very Low
Source: FEMA National Risk Index Per-county per-hazard ratings, December 2025 release
How often does each hazard strike Sanborn County?
FEMA's National Risk Index models a historical event count and an annualized frequency for each hazard type. Most hazards are expressed as modeled occurrences per year; FEMA expresses drought and heat-wave frequency as event-days per year. These modeled frequencies are not forecasts.
| Hazard | NRI Risk Rating | Recurrence |
|---|---|---|
| Wildfire | Relatively Low | roughly once every 890 years |
| Drought | Relatively Low | 14 modeled event-days per year |
| Ice Storm | Relatively Low | roughly once every 2 years |
| Hail | Relatively Low | an average of 4.8 times per year |
| Winter Weather | Relatively Low | an average of 17 times per year |
| Cold Wave | Relatively Low | an average of 8.9 times per year |
| Tornado | Relatively Low | roughly once every 3 years |
| Landslide | Very Low | roughly once every 17 years |
| Heat Wave | Very Low | 5.9 modeled event-days per year |
| Strong Wind | Very Low | an average of 3.2 times per year |
| Earthquake | Very Low | roughly once every 2,481 years |
| Riverine Flooding | Very Low | an average of 2.4 times per year |
| Lightning | Very Low | an average of 36 times per year |
Source: FEMA National Risk Index Modeled annualized frequency; drought and heat wave use event-days/year, December 2025 release
Disaster Types
Flood 10
Severe Storm 7
Biological 2
Coastal Storm 1
Snowstorm 1
Drought 1
What Flood declarations mean here
Flood is the most frequent declaration type on Sanborn County's record, 45% of its declarations. Federal flood declarations cover two mechanisms that behave very differently: riverine flooding, which builds over days as a watershed drains and is usually forecast well in advance, and flash flooding, which can arrive in under an hour from rainfall that fell somewhere upstream.
Flood is also the one hazard class where a second federal dataset exists for the same events. The National Flood Insurance Program records what was actually paid on insured losses, so it measures a narrower thing than the declaration count: uninsured damage, and flooding outside mapped special flood hazard areas, never enters it. Reading the two together is more informative than either alone.
Declaration counts describe past federal action. They are a record of what was declared, not a forecast of future hazard probability.
Declaration Types
What DR / EM / FM mean
FEMA categorizes declarations as Major Disasters (DR), Emergencies (EM), or Fire Management Assistance (FM).
Major Disaster - 19 86.4%
of all 22 declarations
Emergency - 3 13.6%
of all 22 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2024 | 1 | |
| 2020 | 3 | |
| 2019 | 2 | |
| 2011 | 1 | |
| 2010 | 2 | |
| 2007 | 1 | |
| 2006 | 1 | |
| 2005 | 1 | |
| 2001 | 1 | |
| 1997 | 2 | |
| 1996 | 1 | |
| 1995 | 1 | |
| 1994 | 1 | |
| 1993 | 1 | |
| 1986 | 1 | |
Show 2 earlier declaration years
| 1976 | 1 | |
| 1969 | 1 | |
Disaster Declarations
How the 22 FEMA declarations break into federal action codes (DR / EM / FM). Same DISTINCT grain as the table below.
Download these 22 declarations as CSV . FEMA source data is public domain; our derived presentation is CC0.
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 4807 | SEVERE STORMS, STRAIGHT-LINE WINDS, AND FLOODING | DR | Flood | 2024-08-15 |
| 4527 | COVID-19 PANDEMIC | DR | Biological | 2020-04-05 |
| 3475 | COVID-19 | EM | Biological | 2020-03-13 |
| 4469 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 2019-11-18 |
| 4463 | SEVERE STORMS AND FLOODING | DR | Flood | 2019-09-23 |
| 4440 | SEVERE WINTER STORM, SNOWSTORM, AND FLOODING | DR | Flood | 2019-06-07 |
| 1984 | FLOODING | DR | Flood | 2011-05-13 |
| 1938 | SEVERE STORMS AND FLOODING | DR | Severe Storm | 2010-09-23 |
| 1915 | FLOODING | DR | Flood | 2010-05-13 |
| 1702 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 2007-05-22 |
| 1620 | SEVERE WINTER STORM | DR | Severe Storm | 2005-12-20 |
| 3234 | HURRICANE KATRINA EVACUATION | EM | Coastal Storm | 2005-09-10 |
| 1375 | SEVERE WINTER STORMS, FLOODING, AND ICE JAMS | DR | Flood | 2001-05-17 |
| 1173 | SEVERE FLOODING, SEVER WINTER STORMS,HEAVY RAINS HIGH WINDS | DR | Flood | 1997-04-07 |
| 1156 | SEVERE WINTER STORMS AND BLIZZARD CONDITIONS | DR | Severe Storm | 1997-01-10 |
| 1075 | SEVERE WINTER STORM | DR | Snowstorm | 1996-01-05 |
| 1052 | FLOODING | DR | Flood | 1995-05-26 |
| 1031 | SEVERE STORMS AND FLOODING | DR | Severe Storm | 1994-06-21 |
| 999 | SEVERE STORMS, TORNADOES & FLOODING | DR | Severe Storm | 1993-07-19 |
| 764 | SEVERE STORMS & FLOODING | DR | Flood | 1986-05-03 |
Show 2 earlier declaration records
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 3015 | DROUGHT | EM | Drought | 1976-06-17 |
| 257 | FLOODING | DR | Flood | 1969-04-18 |
Storm Events in South Dakota
Statewide NOAA context only. PlainHazard does not currently attribute these state totals to Sanborn County.
| Storm Type | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| Thunderstorm Wind | 5,388 | 7 | 21 | $10.7M |
| Hail | 4,801 | 0 | 3 | $4.5M |
| High Wind | 2,277 | 0 | 1 | $35.0K |
| Winter Weather | 2,125 | 20 | 50 | $133.0K |
| Flood | 1,523 | 5 | 0 | $196.2M |
Source: NOAA Storm Events Database State-level aggregated data, 2015-2025
NFIP Flood Insurance Claims
Total Claims
11
Total Paid
$43.1K
Avg Per Claim
$3.9K
Source: FEMA National Flood Insurance Program (NFIP) OpenFEMA Claims Data
FEMA National Risk Index
Overall Risk
Very Low
Score: 3.6/100
Expected Annual Loss
Very Low
$3.8M/year
Social Vulnerability
Very Low
Community Resilience
Relatively High
Hazard Risk Breakdown
Wildfire Relatively Low
Drought Relatively Low
Ice Storm Relatively Low
Hail Relatively Low
Winter Weather Relatively Low
Cold Wave Relatively Low
Tornado Relatively Low
Landslide Very Low
Heat Wave Very Low
Strong Wind Very Low
Earthquake Very Low
Riverine Flooding Very Low
Lightning Very Low
Source: FEMA National Risk Index (NRI) Ratings reflect relative scores among all US counties. Data: hazards.fema.gov/nri
The model's sharpest exposure here: Wildfire
Wildfire risk in the model reflects fuel, terrain, weather and how much development sits in the wildland-urban interface. It is one of the few hazards where the exposure is materially changed by land management and building choices, not only by where the county happens to be.
Worth noting for Sanborn County: the model and the federal record do NOT point at the same hazard. Wildfire carries the highest modeled rating (Relatively Low), while the county's declaration history is led by Flood. That is not a contradiction, the two measure genuinely different things. Declarations record federal ACTION, which requires damage costly enough to exceed state and local capacity; the Risk Index models EXPECTED annual loss across all 18 hazards whether or not any declaration ever followed. A hazard can be the county's largest modeled exposure and never once have driven a declaration.
National Risk Index ratings are modeled estimates of expected annual loss, not predictions of what will happen in any given year.
Data-matched county comparisons
Sanborn County's closest FEMA peer: Pocahontas County, IA
Comparisons use published FEMA declaration fields plus the National Risk Index composite for Sanborn County. Record similarity, not a safety rating.
Closest declaration profiles
Sanborn County shows 22 FEMA declarations, led by Flood.
Similar Major-disaster share
Sanborn County: 19 of 22 of its declarations are Major.
Similar modeled NRI score
Sanborn County: NRI composite 3.6 (Very Low).
How these peers are chosen
Cohort: Published U.S. county equivalents outside the source state or territory. Each metric keeps six ETL candidates; three unique destinations are shown after de-duplicating across axes. Declaration-volume ranking combines count and Major-disaster share and prefers a different leading incident type; Major-share ranks the Major fraction adjusted for volume; NRI ranks the modeled composite score only.
Retained FEMA snapshot feed for Sanborn County - capture-dated entries only.
Compare beyond this state
Nationwide peers by NRI score & FEMA declaration volume
Two PlainHazard-derived comparison paths for Sanborn County: nearest out-of-state National Risk Index composite and nearest FEMA declaration count (floor ≥5 records). Record similarity only, not a forecast of the next hazard.
Similar NRI composite
Nearest out-of-state counties by FEMA NRI score. This county: 3.6 (Very Low).
Similar declaration volume
Nearest out-of-state counties by FEMA declaration count. This county: 22. NRI peers are excluded so the two link sets stay distinct.
Further reading for this county
Most disaster-prone counties
With 22 FEMA declarations, Sanborn County sits in the high-volume declaration band - see how that count ranks against other U.S. counties.
More PlainHazard guides
- Most disaster-prone counties - U.S. counties ranked by FEMA declaration totals.
- Understanding disaster data - declarations vs storm events vs NRI scores.
- Preparing for natural disasters - household checklist (not county-specific advice).
Frequently Asked Questions
What is the most common disaster type in Sanborn County?
The most common disaster type in Sanborn County is Flood, with 10 declarations. Other disaster types include Severe Storm (7), Biological (2), Coastal Storm (1).
How does Sanborn County's FEMA declaration record compare with the South Dakota average?
FEMA lists 22 declaration records for Sanborn County. That is 16% above the South Dakota county mean of 19.0. Its count is also 6% above the national county mean of 20.7. A larger declaration history records more federal actions; it is not a forecast of the county's next hazard.
How many major FEMA disaster declarations has Sanborn County received?
Sanborn County has received 19 major disaster declarations, representing 86% of all 22 disaster declarations.
How many flood insurance claims has Sanborn County filed?
Sanborn County has 11 National Flood Insurance Program (NFIP) claims totaling $43.1K in payments, with an average of $3.9K per claim.
Does FEMA's top risk-rated hazard match the highest Expected Annual Loss in Sanborn County?
No. In Sanborn County, Wildfire has the highest National Risk Index rating (Relatively Low), while Riverine Flooding leads Expected Annual Loss at about $1.3M. FEMA's risk score and dollar-loss model use different inputs, so the leaders often differ.
What was the worst year for disasters in Sanborn County?
The most active year for disaster declarations in Sanborn County was 2020, with 3 declarations. The county has FEMA disaster data spanning 1969 to 2024.
What is the FEMA National Risk Index score for Sanborn County?
According to the FEMA National Risk Index, Sanborn County, South Dakota has an overall risk score of 3.6 out of 100 (Very Low). The county's social vulnerability rating is Very Low and community resilience is Relatively High. The Expected Annual Loss (EAL) score is Very Low, representing $3.8M in annualized losses.
Which natural hazard poses the greatest risk to Sanborn County?
FEMA's NRI data points to Sanborn County is Wildfire (risk rating: Relatively Low). Other significant hazards include Drought (Relatively Low) and Ice Storm (Relatively Low). FEMA's modeled event frequency puts wildfire here at roughly once every 890 years. The underlying methodology weighs historical event frequency against exposed assets and community vulnerability.
Data Sources & Methodology
Disaster declaration data comes from the FEMA OpenFEMA Disaster Declarations Summaries v2 API, which includes all federally declared disasters, emergencies, and fire management assistance grants.
Storm event data is sourced from the NOAA Storm Events Database (2015-2025), which tracks significant weather events including thunderstorms, tornadoes, floods, and winter storms.
Flood insurance data comes from the FEMA National Flood Insurance Program (NFIP) OpenFEMA claims dataset.
This data is provided for informational purposes only. FEMA disaster declarations represent federal response actions and may not capture all local emergencies or weather events.
FEMA OpenFEMA declarations + NRI for Sanborn County · vintage 2026-08-25 · Methodology · South Dakota profile · Verify with FEMA OpenFEMA · Verify with NOAA Storm Events