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Illinois · FEMA + NOAA + National Risk Index

Clark County, IL

10 FEMA disaster declarations (1974-2023), with a FEMA National Risk Index rating of Very Low. Most common hazard: Flood.

10
FEMA declarations
8
Major disasters
27
NRI risk · Very Low
Flood
Top hazard

The verdict

Clark County has a nationally busy FEMA history: 10 declarations, more than 10% of counties in this registry. But the state comparison tempers that reading: the total is 22% below the Illinois county mean. FEMA's separate National Risk Index places the county safer than 27%; that score models loss and vulnerability rather than counting declarations.

Safer than 27%
of U.S. counties for FEMA National Risk Index score
Very Low
FEMA National Risk Index rating
10
FEMA declarations vs 21 national county avg
18
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.

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FEMA OpenFEMA declaration desk

County FIPS 17023 · Clark County 10 declarations · rank 2942/3,266

DECL-MID · MAJOR-HEAVY · RANK-LOWER · PHOTO-FINISH · NRI-LOW · ACT-HIGH · TYPE-LEAD · VS-ST-BELOW

  • DECL-MID 10
  • MAJOR-HEAVY 80%
  • RANK-LOWER #2,942
  • PHOTO-FINISH Cheyenne
  • NRI-LOW Very Low
  • ACT-HIGH High
  • TYPE-LEAD Flood
  • VS-ST-BELOW -22%

Nearest declaration peer: Cheyenne, NE (0 declaration gap)

FEMA Disaster Declarations Summaries v2 filing stamps for this county register. Read with this county → · Illinois state profile

Clark County among counties with fewer federal records

FEMA declaration records among Clark County and nearest peers by total count

declarations

What this shows Clark County carries 10 FEMA declaration records, ranked 2942 of 3,266 counties in this registry.

Source FEMA OpenFEMA Disaster Declarations Summaries v2 As of 2026-08-25

Clark County versus quieter counties in this dataset

Clark County among lower-declaration counties nationally

FEMA disaster declarations, all-time · Clark County

10 10th percentile higher than 10% of 3,266 counties

This county 0 90 all U.S. counties FEMA tracks, bucketed by value

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

Clark County's FEMA Risk Index score

0/100100/100Illinois avg55/10027.3/100
FEMA National Risk Index composite score vs. the Illinois county average

Which hazard drives modeled loss here?

FEMA's modeled annual dollar loss for Clark County is led by Riverine Flooding (about $3.5M Expected Annual Loss, Historical Loss Ratio Relatively High), while Earthquake 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 Clark County's hazard record show?

FEMA National Risk Index

This county's FEMA National Risk Index composite lands at 27.3/100 (Very Low), a modest reading against the rest of the country. Expected Annual Loss is rated Very Low (roughly $8.8M in annualized losses), tempered or compounded by a Relatively Moderate social-vulnerability score and Relatively High community-resilience score. Even the county's top-rated hazard, Earthquake, 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 246 years here.

Reading the federal records together

This county has a small entry in FEMA's NFIP paid-claims table: 18 claims and $208.5K 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.

Start with the state benchmark: a Illinois county averages 12.9 federal declaration records, while Clark County has 10. The gap is 22% below that mean. Fewer entries indicate a quieter history of recorded federal actions, not immunity from a hazard and not a prediction about what happens next.

52 /100

Historical Activity Index

High historical activity

Clark County, IL · 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) Low
7/30

10 OpenFEMA declarations, full ingest window (0.5x national county average)

County Disaster Density Moderate
10/25

10 declarations (0.8x state county average of 13)

Major Disaster Share Very High
20/25

8 of 10 declarations are major disasters (80%)

Hazard Diversity Very High
15/20

6 different disaster types declared in Clark County

FEMA NRI 8-hazard radar - Clark County

Clark County NRI risk profile 8-axis FEMA National Risk Index radar showing per-hazard scores for Earthquake 25, Flood 8, Hurricane 8, Tornado 25, Wildfire 8, Drought 48, Heat Wave 25, Winter Storm 25. The simple mean of these eight displayed scores is 22 of 100. Earthquake Flood Hurricane Tornado Wildfire Drought Heat Wave Winter Storm 22 8-hazard mean
Clark County NRI risk profile FIPS 17023 · displayed-hazard mean 22/100
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.

FEMA Records

10

Low volume

Major Disaster share

80%

Mostly major

NRI risk score

27

Very Low

Source: FEMA National Risk Index Per-county per-hazard ratings, December 2025 release

How often does each hazard strike Clark 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
Earthquake Relatively Low roughly once every 246 years
Drought Relatively Moderate 2.6 modeled event-days per year
Landslide Relatively Low roughly once every 4 years
Heat Wave Relatively Low 7.5 modeled event-days per year
Winter Weather Relatively Low an average of 7.4 times per year
Hail Relatively Low an average of 2.9 times per year
Cold Wave Relatively Low an average of 1.8 times per year
Ice Storm Relatively Low roughly once every 1 years
Hurricane Very Low roughly once every 35 years
Tornado Relatively Low roughly once every 3 years
Riverine Flooding Very Low an average of 1.2 times per year
Strong Wind Relatively Low an average of 4.3 times per year
Lightning Very Low an average of 48 times per year
Wildfire Very Low roughly once every 36,326 years

Source: FEMA National Risk Index Modeled annualized frequency; drought and heat wave use event-days/year, December 2025 release

Disaster Types

Flood 3
Severe Storm 2
Biological 2
Snowstorm 1
Hurricane 1
Tornado 1

What Flood declarations mean here

Flood is the most frequent declaration type on Clark County's record, 30% 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 - 8 80.0%

of all 10 declarations

Emergency - 2 20.0%

of all 10 declarations

FEMA Declarations Timeline

Year Declarations
2023 1
2020 2
2013 1
2011 1
2008 1
2005 1
2002 1
1985 1
1974 1

Disaster Declarations

How the 10 FEMA declarations break into federal action codes (DR / EM / FM). Same DISTINCT grain as the table below.

Download these 10 declarations as CSV . FEMA source data is public domain; our derived presentation is CC0.

DR# Title Type Incident Date
4728 SEVERE STORMS AND FLOODING DR Severe Storm 2023-08-15
4489 COVID-19 PANDEMIC DR Biological 2020-03-26
3435 COVID-19 EM Biological 2020-03-13
4116 SEVERE STORMS, STRAIGHT-LINE WINDS, AND FLOODING DR Flood 2013-05-10
1960 SEVERE WINTER STORM AND SNOWSTORM DR Snowstorm 2011-03-17
1771 SEVERE STORMS AND FLOODING DR Severe Storm 2008-06-24
3230 HURRICANE KATRINA EVACUATION EM Hurricane 2005-09-07
1416 SEVERE STORMS, TORNADOES AND FLOODING DR Tornado 2002-05-21
735 SEVERE STORMS & FLOODING DR Flood 1985-03-29
438 SEVERE STORMS & FLOODING DR Flood 1974-06-10

Storm Events in Illinois

Statewide NOAA context only. PlainHazard does not currently attribute these state totals to Clark County.

Storm Type Events Fatalities Injuries Property Damage
Thunderstorm Wind 7,218 9 67 $46.0M
Hail 3,195 0 0 $27.1M
Winter Weather 1,363 14 49 $1.8M
Flood 1,221 14 11 $84.3M
Flash Flood 1,133 11 3 $1.1B

Source: NOAA Storm Events Database State-level aggregated data, 2015-2025

NFIP Flood Insurance Claims

Total Claims

18

Total Paid

$208.5K

Avg Per Claim

$11.6K

Source: FEMA National Flood Insurance Program (NFIP) OpenFEMA Claims Data

FEMA National Risk Index

Overall Risk

Very Low

Score: 27.3/100

Expected Annual Loss

Very Low

$8.8M/year

Social Vulnerability

Relatively Moderate

Community Resilience

Relatively High

Hazard Risk Breakdown

Earthquake Relatively Low
Drought Relatively Moderate
Landslide Relatively Low
Heat Wave Relatively Low
Winter Weather Relatively Low
Hail Relatively Low
Cold Wave Relatively Low
Ice Storm Relatively Low
Hurricane Very Low
Tornado Relatively Low
Riverine Flooding Very Low
Strong Wind Relatively Low
Lightning Very Low
Wildfire 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: Earthquake

Earthquake is the model's clearest example of a hazard with no season and no warning. Its expected loss is driven less by how often shaking occurs than by how much of the building stock predates modern seismic codes, so exposure can be high in places where nothing has happened for a long time.

Worth noting for Clark County: the model and the federal record do NOT point at the same hazard. Earthquake 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

Clark County's closest FEMA peer: Cheyenne County, NE

Comparisons use published FEMA declaration fields plus the National Risk Index composite for Clark County. Record similarity, not a safety rating.

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 Clark County - capture-dated entries only.

Compare beyond this state

Nationwide peers by NRI score & FEMA declaration volume

Two PlainHazard-derived comparison paths for Clark 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.

Further reading for this county

Most disaster-prone counties

With 10 FEMA declarations, Clark County sits in the high-volume declaration band - see how that count ranks against other U.S. counties.

More PlainHazard guides

Frequently Asked Questions

What is the most common disaster type in Clark County?
The most common disaster type in Clark County is Flood, with 3 declarations. Other disaster types include Severe Storm (2), Biological (2), Snowstorm (1).
How does Clark County's FEMA declaration record compare with the Illinois average?
The typical Illinois county has 12.9 FEMA declaration records; Clark County has 10, or 22% fewer. Against the national county mean of 20.7, this county's total is 52% lower. The comparison is historical and says nothing about the probability of a future event.
How many major FEMA disaster declarations has Clark County received?
Clark County has received 8 major disaster declarations, representing 80% of all 10 disaster declarations.
How many flood insurance claims has Clark County filed?
Clark County has 18 National Flood Insurance Program (NFIP) claims totaling $208.5K in payments, with an average of $11.6K per claim.
Does FEMA's top risk-rated hazard match the highest Expected Annual Loss in Clark County?
No. In Clark County, Earthquake has the highest National Risk Index rating (Relatively Low), while Riverine Flooding leads Expected Annual Loss at about $3.5M. FEMA's risk score and dollar-loss model use different inputs, so the leaders often differ.
What was the worst year for disasters in Clark County?
The most active year for disaster declarations in Clark County was 2020, with 2 declarations. The county has FEMA disaster data spanning 1974 to 2023.
What is the FEMA National Risk Index score for Clark County?
According to the FEMA National Risk Index, Clark County, Illinois has an overall risk score of 27.3 out of 100 (Very Low). On social vulnerability the county rates Relatively Moderate; on community resilience, Relatively High. The Expected Annual Loss (EAL) score is Very Low, representing $8.8M in annualized losses.
Which natural hazard poses the greatest risk to Clark County?
FEMA's NRI data points to Clark County as of the latest release is Earthquake (risk rating: Relatively Low). Other significant hazards include Drought (Relatively Moderate) and Landslide (Relatively Low). FEMA's modeled event frequency puts earthquake here at roughly once every 246 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 Clark County · vintage 2026-08-25 · Methodology · Illinois profile · Verify with FEMA OpenFEMA · Verify with NOAA Storm Events