FEMA Records
30
High volume
Missouri · FEMA + NOAA + National Risk Index
Jefferson County, MO
30 FEMA disaster declarations (1973-2025), with a FEMA National Risk Index rating of Relatively Moderate. Most common hazard: Severe Storm.
- 30
- FEMA declarations
- 22
- Major disasters
- 91
- NRI risk · Relatively Moderate
- Severe Storm
- Top hazard
The verdict
Two federal records point in the busier direction for Jefferson County. Its 30 FEMA declarations are 22% above the Missouri county mean and exceed the count for 86% of the 3,266 counties in this registry. Separately, FEMA's National Risk Index places it in the riskiest 9%, based on modeled expected annual loss, social vulnerability, and community resilience.
- Riskiest 9%
- of U.S. counties for FEMA National Risk Index score
- Relatively Moderate
- FEMA National Risk Index rating
- 30
- FEMA declarations vs 21 national county avg
- 4,592
- 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.
How does Jefferson County compare?
Jefferson County vs. all counties in this dataset
FEMA disaster declarations, all-time
30 Top 14% higher than 86% 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 · 2026-08-03
Jefferson County's FEMA Risk Index score
FEMA National Risk Index composite score vs. the Missouri county average
Which hazard drives modeled loss here?
FEMA's modeled annual dollar loss for Jefferson County is led by Riverine Flooding (about $58.6M Expected Annual Loss, Historical Loss Ratio Relatively Moderate), while Strong Wind carries the highest National Risk Index rating (Very High). 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 Jefferson County's hazard record show?
Reading the federal records together
FEMA's NFIP table contains a substantial paid-claim history for this county: 4,592 claims and $69.3M in payments. PlainHazard labels 500 or more claims a heavy registry record; that is a reporting bucket, not an official FEMA risk grade. The average paid claim was $15.1K. NFIP totals exclude uninsured flood losses and do not measure how many properties currently carry a policy.
The declaration register points in the busier direction. Jefferson County's 30 federal records stand 22% above the Missouri county mean of 24.6. 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.
FEMA National Risk Index
This county sits among the highest-risk counties nationally on FEMA's National Risk Index, a composite score of 90.5/100 (Relatively Moderate). Expected Annual Loss is rated Relatively Moderate (roughly $114.5M in annualized losses). Social vulnerability reads Very Low and community resilience Relatively High, both critical modifiers of realized harm here. Of the 18 hazards FEMA models, Strong Wind stands out as the sharpest exposure here, rated Very High. FEMA's modeled frequency puts that hazard at an average of 5.6 times per year here, based on 213 historical events on record.
Declaration frequency
The FEMA register is busy by both local and national comparisons. It contains 30 entries for Jefferson County, including 22 Major Disaster records, 22% above the Missouri county mean. Across the 52-year span, that works out to 0.6 declarations a year. Severe Storm leads the file with 16 entries. Declaration type records the federal action taken, not every assistance program approved.
73 /100
Historical Activity Index
High historical activity
Jefferson County, MO · 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
22/30
30 OpenFEMA declarations, full ingest window (1.4x national county average)
County Disaster Density High
15/25
30 declarations (1.2x state county average of 25)
Major Disaster Share High
18/25
22 of 30 declarations are major disasters (73%)
Hazard Diversity Very High
18/20
7 different disaster types declared in Jefferson County
Historical Declaration Activity
Activity Band
High
vs. Missouri Avg
+22%
State avg: 24.6
vs. National Avg
+45%
National avg: 20.7
Avg Per Year
0.6
Over 52 years
FEMA NRI 8-hazard radar - Jefferson 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
73%
Major-heavy
NRI risk score
91
Relatively Moderate
Source: FEMA National Risk Index Per-county per-hazard ratings, December 2025 release
How often does each hazard strike Jefferson 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 |
|---|---|---|
| Strong Wind | Very High | an average of 5.6 times per year |
| Landslide | Relatively Moderate | an average of 2.5 times per year |
| Tornado | Relatively High | roughly once every 2 years |
| Hail | Relatively Moderate | an average of 5.2 times per year |
| Earthquake | Relatively Moderate | roughly once every 168 years |
| Heat Wave | Relatively Moderate | 13 modeled event-days per year |
| Riverine Flooding | Relatively Moderate | an average of 1.8 times per year |
| Lightning | Relatively High | an average of 54 times per year |
| Cold Wave | Relatively Moderate | an average of 1.4 times per year |
| Winter Weather | Relatively Moderate | an average of 8.6 times per year |
| Ice Storm | Relatively Moderate | an average of 1.2 times per year |
| Wildfire | Very Low | roughly once every 2,925 years |
| Hurricane | Very Low | roughly once every 65 years |
| Drought | Very Low | 2 modeled event-days per year |
Source: FEMA National Risk Index Modeled annualized frequency; drought and heat wave use event-days/year, December 2025 release
Disaster Types
Severe Storm 16
Flood 7
Biological 2
Severe Ice Storm 2
Hurricane 1
Tornado 1
Drought 1
What Severe Storm declarations mean here
Severe Storm is the most frequent declaration type on Jefferson County's record, 53% of its declarations. In FEMA's vocabulary this covers convective weather: thunderstorm straight-line winds, large hail, and the multi-day outbreaks that often carry embedded tornadoes. Activity is heaviest in spring and summer, though the season varies by region.
These events behave differently from a hurricane on paper. Damage tends to be distributed along a storm track rather than concentrated on a coastline, and a declaration typically follows an outbreak that crossed several counties over a few days, not a single point of impact. Because the qualifying threshold is the cost of uninsured public and individual losses rather than storm intensity, two similar storms can produce a declaration in one year and none in another.
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 - 22 73.3%
of all 30 declarations
Emergency - 8 26.7%
of all 30 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2025 | 1 | |
| 2020 | 2 | |
| 2019 | 1 | |
| 2017 | 1 | |
| 2016 | 2 | |
| 2015 | 1 | |
| 2011 | 1 | |
| 2009 | 3 | |
| 2008 | 3 | |
| 2006 | 2 | |
| 2005 | 1 | |
| 2003 | 1 | |
| 2002 | 1 | |
| 2000 | 1 | |
| 1995 | 1 | |
Show 6 earlier declaration years
| 1994 | 2 | |
| 1993 | 2 | |
| 1983 | 1 | |
| 1979 | 1 | |
| 1976 | 1 | |
| 1973 | 1 | |
Disaster Declarations
How the 30 FEMA declarations break into federal action codes (DR / EM / FM). Same DISTINCT grain as the table below.
Download these 30 declarations as CSV . FEMA source data is public domain; our derived presentation is CC0.
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 4867 | SEVERE STORMS, STRAIGHT-LINE WINDS, TORNADOES, AND WILDFIRES | DR | Severe Storm | 2025-05-21 |
| 4490 | COVID-19 PANDEMIC | DR | Biological | 2020-03-26 |
| 3482 | COVID-19 | EM | Biological | 2020-03-13 |
| 4451 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 2019-07-09 |
| 4317 | SEVERE STORMS, TORNADOES, STRAIGHT-LINE WINDS AND FLOODING | DR | Flood | 2017-06-02 |
| 4250 | SEVERE STORMS, TORNADOES, STRAIGHT-LINE WINDS, AND FLOODING | DR | Flood | 2016-01-21 |
| 3374 | SEVERE STORMS, TORNADOES, STRAIGHT-LINE WINDS, AND FLOODING | EM | Flood | 2016-01-02 |
| 4238 | SEVERE STORMS, TORNADOES, STRAIGHT-LINE WINDS, AND FLOODING | DR | Severe Storm | 2015-08-07 |
| 3317 | SEVERE WINTER STORM | EM | Severe Storm | 2011-02-03 |
| 1847 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 2009-06-19 |
| 3303 | SEVERE WINTER STORM | EM | Severe Ice Storm | 2009-01-30 |
| 1809 | SEVERE STORMS, FLOODING, AND A TORNADO | DR | Severe Storm | 2008-11-13 |
| 1773 | SEVERE STORMS AND FLOODING | DR | Severe Storm | 2008-06-25 |
| 1749 | SEVERE STORMS AND FLOODING | DR | Severe Storm | 2008-03-19 |
| 3281 | SEVERE WINTER STORMS | EM | Severe Ice Storm | 2007-12-12 |
| 3267 | SEVERE STORMS | EM | Severe Storm | 2006-07-21 |
| 1631 | SEVERE STORMS, TORNADOES AND FLOODING | DR | Severe Storm | 2006-03-16 |
| 3232 | HURRICANE KATRINA EVACUATION | EM | Hurricane | 2005-09-10 |
| 1463 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 2003-05-06 |
| 1412 | SEVERE STORMS, TORNADOES AND FLOODING | DR | Severe Storm | 2002-05-06 |
Show 10 earlier declaration records
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 1328 | SEVERE THUNDERSTORMS AND FLASH FLOODING | DR | Flood | 2000-05-12 |
| 1054 | SEVERE STORMS, TORNADOES, HAIL, FLOODING | DR | Severe Storm | 1995-06-02 |
| 1023 | SEVERE STORMS, TORNADOES, FLOODING | DR | Severe Storm | 1994-04-21 |
| 1006 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 1993-12-01 |
| 995 | SEVERE STORMS & FLOODING | DR | Flood | 1993-07-09 |
| 989 | SEVERE STORMS & FLOODING | DR | Flood | 1993-05-11 |
| 672 | SEVERE STORMS AND FLOODING | DR | Flood | 1982-12-10 |
| 579 | TORNADOES, TORRENTIAL RAIN & FLOODING | DR | Tornado | 1979-04-21 |
| 3017 | DROUGHT | EM | Drought | 1976-09-24 |
| 372 | HEAVY RAINS, TORNADOES & FLOODING | DR | Severe Storm | 1973-04-19 |
Storm Events in Missouri
Statewide NOAA context only. PlainHazard does not currently attribute these state totals to Jefferson County.
| Storm Type | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| Thunderstorm Wind | 6,391 | 30 | 52 | $63.4M |
| Hail | 4,411 | 0 | 1 | $86.1M |
| Flash Flood | 2,399 | 47 | 14 | $406.6M |
| Flood | 1,810 | 25 | 7 | $304.6M |
| Drought | 1,033 | 0 | 350 | $53.6M |
Source: NOAA Storm Events Database State-level aggregated data, 2015-2025
NFIP Flood Insurance Claims
Total Claims
4,592
Total Paid
$69.3M
Avg Per Claim
$15.1K
Source: FEMA National Flood Insurance Program (NFIP) OpenFEMA Claims Data
FEMA National Risk Index
Overall Risk
Relatively Moderate
Score: 90.5/100
Expected Annual Loss
Relatively Moderate
$114.5M/year
Social Vulnerability
Very Low
Community Resilience
Relatively High
Hazard Risk Breakdown
Strong Wind Very High
Landslide Relatively Moderate
Tornado Relatively High
Hail Relatively Moderate
Earthquake Relatively Moderate
Heat Wave Relatively Moderate
Riverine Flooding Relatively Moderate
Lightning Relatively High
Cold Wave Relatively Moderate
Winter Weather Relatively Moderate
Ice Storm Relatively Moderate
Wildfire Very Low
Hurricane Very Low
Drought 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: Strong Wind
Strong Wind covers damaging non-thunderstorm, non-tornadic wind, the kind produced by steep pressure gradients and downslope events. It is a broad, frequent, low-drama hazard: roofs, signage, power lines and high-profile vehicles, spread across a wide area rather than concentrated on a path.
For Jefferson County the two measures on this page point the same way: Strong Wind is the county's highest-rated modeled hazard (Very High), and Severe Storm declarations also lead its federal record. Where the model and the declaration history agree, the reading is comparatively straightforward, the hazard is both expected and repeatedly realised.
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
Jefferson County's closest FEMA peer: Solano County, CA
Comparisons use published FEMA declaration fields plus the National Risk Index composite for Jefferson County. Record similarity, not a safety rating.
Closest declaration profiles
Jefferson County shows 30 FEMA declarations, led by Severe Storm.
Similar Major-disaster share
Jefferson County: 22 of 30 of its declarations are Major.
Similar modeled NRI score
Jefferson County: NRI composite 90.5 (Relatively Moderate).
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 Jefferson County - capture-dated entries only.
Further reading for this county
Understanding disaster data
Jefferson County's NFIP claims file (4,592 claims) and FEMA declaration history measure different federal records - this guide separates them from modeled NRI risk.
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).
Related
Frequently Asked Questions
What is the most common disaster type in Jefferson County?
The most common disaster type in Jefferson County is Severe Storm, with 16 declarations. Other disaster types include Flood (7), Biological (2), Severe Ice Storm (2).
How does Jefferson County's FEMA declaration record compare with the Missouri average?
FEMA lists 30 declaration records for Jefferson County. That is 22% above the Missouri county mean of 24.6. Its count is also 45% 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 Jefferson County received?
Jefferson County has received 22 major disaster declarations, representing 73% of all 30 disaster declarations.
How many flood insurance claims has Jefferson County filed?
Jefferson County has 4,592 National Flood Insurance Program (NFIP) claims totaling $69.3M in payments, with an average of $15.1K per claim.
Does FEMA's top risk-rated hazard match the highest Expected Annual Loss in Jefferson County?
No. In Jefferson County, Strong Wind has the highest National Risk Index rating (Very High), while Riverine Flooding leads Expected Annual Loss at about $58.6M. FEMA's risk score and dollar-loss model use different inputs, so the leaders often differ.
What was the worst year for disasters in Jefferson County?
The most active year for disaster declarations in Jefferson County was 2008, with 3 declarations. The county has FEMA disaster data spanning 1973 to 2025.
What is the FEMA National Risk Index score for Jefferson County?
According to the FEMA National Risk Index, Jefferson County, Missouri has an overall risk score of 90.5 out of 100 (Relatively Moderate). On social vulnerability the county rates Very Low; on community resilience, Relatively High. The Expected Annual Loss (EAL) score is Relatively Moderate, representing $114.5M in annualized losses.
Which natural hazard poses the greatest risk to Jefferson County?
FEMA's NRI data points to Jefferson County is Strong Wind (risk rating: Very High). Other significant hazards include Landslide (Relatively Moderate) and Tornado (Relatively High). FEMA's modeled event frequency puts strong wind here at an average of 5.6 times per year, drawn from 213 historical events on record. 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.
What this means for Jefferson County
Jefferson County, MO has 30 federal declaration records, 22% more than the Missouri county mean of 25; its history sits in PlainHazard's high activity band.
- Within this above-state-average declaration file, major disaster leads with 22 of 30 records; the category describes past federal action, not the next likely hazard. Missouri overview
- The state benchmark and national rank point the same way: this count tops the Missouri mean and the totals for 86% of 3,266 U.S. counties. Most-disaster rankings
- The large NFIP claims file and FEMA declaration history measure different federal records; the guide explains where they overlap and where they do not. Disaster-data guide
An above-average declaration count records past federal responses; it does not predict the next event. Current warnings come from the National Weather Service and local emergency officials.
PlainHazard derives this profile from FEMA's Disaster Declarations Summaries and National Risk Index data. The declaration comparison covers 3,266 U.S. counties and county equivalents in this database, refreshed as of 2026-08-03. Read our methodology - how this data is sourced, computed, and verified.
All federal data sources used on this page
- FEMA OpenFEMA, Disaster Declarations Summaries v2 - all federally-declared disasters for this county. fema.gov/openfema/disaster-declarations
- FEMA National Risk Index (NRI) - per-county per-hazard risk ratings and expected annual loss. hazards.fema.gov/nri
- NOAA NCEI Storm Events Database - state-level storm/severe-weather event records, 2015-2025. ncdc.noaa.gov/stormevents
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainHazard Editorial
Verify with FEMA → · Verify with FEMA NRI → · Verify with NOAA →
Every figure on PlainHazard is rendered directly from FEMA federal disaster data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or national statistics report, the data & editorial changelog, or report a data error.