FEMA Records
7
Low volume
Illinois · FEMA + NOAA + National Risk Index
Johnson County, IL
7 FEMA disaster declarations (1973-2020), with a FEMA National Risk Index rating of Relatively Low. Most common hazard: Biological.
- 7
- FEMA declarations
- 4
- Major disasters
- 51
- NRI risk · Relatively Low
- Biological
- Top hazard
The verdict
Start with the local benchmark for Johnson County: 7 FEMA declaration records are 46% below the Illinois county mean, even though the count is higher than 4% of counties in the national registry. On FEMA's distinct National Risk Index model, which combines expected loss with vulnerability and resilience, the county ranks in the riskiest 49%.
- Riskiest 49%
- of U.S. counties for FEMA National Risk Index score
- Relatively Low
- FEMA National Risk Index rating
- 7
- FEMA declarations vs 21 national county avg
- 3
- 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 Johnson County compare?
Johnson County vs. all counties in this dataset
FEMA disaster declarations, all-time
7 4th percentile higher than 4% 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
Johnson County's FEMA Risk Index score
FEMA National Risk Index composite score vs. the Illinois county average
What does Johnson County's hazard record show?
FEMA National Risk Index
This county carries a high composite score on FEMA's National Risk Index, 51.1/100, rated Relatively Low. Its Expected Annual Loss rating is Very Low (roughly $11.9M in annualized losses), and a Very High social-vulnerability profile combined with Relatively Moderate community resilience shapes how much of that raw exposure becomes realized harm. Among the 18 modeled hazards, Earthquake carries the county's highest rating, a mid-range Relatively Moderate. FEMA's modeled frequency puts that hazard at roughly once every 100 years here.
Declaration frequency
The state comparison is the clearest context for Johnson County's moderate federal record. Its 7 declarations sit 46% below the Illinois county mean, with 4 Major Disaster entries among them. 2 records concern Biological, the file's most frequent incident type. Spread across 47 years, the registry rate is 0.1 per year. FEMA reports authorized programs separately from the DR, EM, and FM codes.
Reading the federal records together
This county has a small entry in FEMA's NFIP paid-claims table: 3 claims and $19.8K 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 Johnson County has 7. The gap is 46% 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.
41 /100
Historical Activity Index
Moderate historical activity
Johnson 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
5/30
7 OpenFEMA declarations, full ingest window (0.3x national county average)
County Disaster Density Moderate
7/25
7 declarations (0.5x state county average of 13)
Major Disaster Share High
14/25
4 of 7 declarations are major disasters (57%)
Hazard Diversity Very High
15/20
6 different disaster types declared in Johnson County
Historical Declaration Activity
Activity Band
Moderate
vs. Illinois Avg
-46%
State avg: 12.9
vs. National Avg
-66%
National avg: 20.7
Avg Per Year
0.1
Over 47 years
FEMA NRI 8-hazard radar - Johnson 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
57%
Major-heavy
NRI risk score
51
Relatively Low
Source: FEMA National Risk Index Per-county per-hazard ratings, December 2025 release
How often does each hazard strike Johnson 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 Moderate | roughly once every 100 years |
| Heat Wave | Relatively Low | 10 modeled event-days per year |
| Strong Wind | Relatively Moderate | an average of 4 times per year |
| Ice Storm | Relatively Moderate | roughly once every 1 years |
| Hail | Relatively Low | an average of 3.2 times per year |
| Winter Weather | Relatively Moderate | an average of 7.5 times per year |
| Cold Wave | Relatively Low | an average of 1.1 times per year |
| Tornado | Relatively Low | roughly once every 3 years |
| Drought | Relatively Low | 4 modeled event-days per year |
| Landslide | Very Low | roughly once every 1 years |
| Hurricane | Very Low | roughly once every 46 years |
| Riverine Flooding | Relatively Low | roughly once every 1 years |
| Lightning | Relatively Low | an average of 55 times per year |
| Wildfire | Very Low | roughly once every 2,770 years |
Source: FEMA National Risk Index Modeled annualized frequency; drought and heat wave use event-days/year, December 2025 release
Disaster Types
Biological 2
Severe Storm 1
Hurricane 1
Snowstorm 1
Tornado 1
Flood 1
What Biological declarations mean here
Biological is the most frequent declaration type on Johnson County's record, 29% of its declarations. In practice this category is dominated by the COVID-19 declarations of 2020, which were issued across every US state and territory rather than in response to any local hazard event.
This has a direct consequence for how Johnson County's number should be read. Because those declarations reached essentially every county in the country, they raise every county's total by a similar amount and tell you nothing about local hazard exposure. A county whose record is led by Biological declarations is, in most cases, a county with a genuinely quiet weather-hazard history, the pandemic records are simply the largest thing in an otherwise short list.
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 - 4 57.1%
of all 7 declarations
Emergency - 3 42.9%
of all 7 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2020 | 2 | |
| 2009 | 1 | |
| 2005 | 2 | |
| 2002 | 1 | |
| 1973 | 1 | |
Disaster Declarations
How the 7 FEMA declarations break into federal action codes (DR / EM / FM). Same DISTINCT grain as the table below.
Download these 7 declarations as CSV . FEMA source data is public domain; our derived presentation is CC0.
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 4489 | COVID-19 PANDEMIC | DR | Biological | 2020-03-26 |
| 3435 | COVID-19 | EM | Biological | 2020-03-13 |
| 1826 | SEVERE WINTER STORM | DR | Severe Storm | 2009-03-02 |
| 3230 | HURRICANE KATRINA EVACUATION | EM | Hurricane | 2005-09-07 |
| 3199 | RECORD/NEAR RECORD SNOW | EM | Snowstorm | 2005-02-01 |
| 1416 | SEVERE STORMS, TORNADOES AND FLOODING | DR | Tornado | 2002-05-21 |
| 373 | SEVERE STORMS & FLOODING | DR | Flood | 1973-04-26 |
Storm Events in Illinois
Statewide NOAA context only. PlainHazard does not currently attribute these state totals to Johnson 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
3
Total Paid
$19.8K
Avg Per Claim
$6.6K
Source: FEMA National Flood Insurance Program (NFIP) OpenFEMA Claims Data
FEMA National Risk Index
Overall Risk
Relatively Low
Score: 51.1/100
Expected Annual Loss
Very Low
$11.9M/year
Social Vulnerability
Very High
Community Resilience
Relatively Moderate
Hazard Risk Breakdown
Earthquake Relatively Moderate
Heat Wave Relatively Low
Strong Wind Relatively Moderate
Ice Storm Relatively Moderate
Hail Relatively Low
Winter Weather Relatively Moderate
Cold Wave Relatively Low
Tornado Relatively Low
Drought Relatively Low
Landslide Very Low
Hurricane Very Low
Riverine Flooding Relatively Low
Lightning Relatively 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 Johnson County: the model and the federal record do NOT point at the same hazard. Earthquake carries the highest modeled rating (Relatively Moderate), while the county's declaration history is led by Biological. 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
Johnson County's closest FEMA peer: Conejos County, CO
Comparisons use published FEMA declaration fields plus the National Risk Index composite for Johnson County. Record similarity, not a safety rating.
Closest declaration profiles
Johnson County shows 7 FEMA declarations, led by Biological.
Similar Major-disaster share
Johnson County: 4 of 7 of its declarations are Major.
Similar modeled NRI score
Johnson County: NRI composite 51.1 (Relatively 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 Johnson County - capture-dated entries only.
Further reading for this county
Understanding disaster data
FEMA's National Risk Index flags Earthquake as the top modeled exposure here (Relatively Moderate); the guide explains how that model differs from declaration counts.
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 Johnson County?
The most common disaster type in Johnson County is Biological, with 2 declarations. Other disaster types include Severe Storm (1), Hurricane (1), Snowstorm (1).
How does Johnson County's FEMA declaration record compare with the Illinois average?
The typical Illinois county has 12.9 FEMA declaration records; Johnson County has 7, or 46% fewer. Against the national county mean of 20.7, this county's total is 66% lower. The comparison is historical and says nothing about the probability of a future event.
How many major FEMA disaster declarations has Johnson County received?
Johnson County has received 4 major disaster declarations, representing 57% of all 7 disaster declarations.
How many flood insurance claims has Johnson County filed?
Johnson County has 3 National Flood Insurance Program (NFIP) claims totaling $19.8K in payments, with an average of $6.6K per claim.
What was the worst year for disasters in Johnson County?
The most active year for disaster declarations in Johnson County was 2005, with 2 declarations. The county has FEMA disaster data spanning 1973 to 2020.
What is the FEMA National Risk Index score for Johnson County?
According to the FEMA National Risk Index, Johnson County, Illinois has an overall risk score of 51.1 out of 100 (Relatively Low). The county's social vulnerability rating is Very High and community resilience is Relatively Moderate. The Expected Annual Loss (EAL) score is Very Low, representing $11.9M in annualized losses.
Which natural hazard poses the greatest risk to Johnson County?
FEMA's NRI data points to Johnson County as of the latest release is Earthquake (risk rating: Relatively Moderate). Other significant hazards include Heat Wave (Relatively Low) and Strong Wind (Relatively Moderate). FEMA's modeled event frequency puts earthquake here at roughly once every 100 years. FEMA derives these ratings from historical event frequency, the assets exposed, and the community's vulnerability profile.
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 Johnson County
Against a Illinois county mean of 13 declarations, Johnson County, IL records 7, or 46% fewer. PlainHazard classifies that historical total as moderate activity.
- Major Disaster is the largest group (4 of 7) in a declaration history that remains below its state benchmark; frequency here is not a forecast. Illinois overview
- Nationally the county exceeds 4% of recorded county totals, but its own Illinois benchmark is higher. The ranking keeps those two contexts separate. Most-disaster rankings
- A short NFIP claims file cannot establish low flood exposure; the data guide explains the limits of each federal measure. Disaster-data guide
A below-average federal record is not a safety guarantee. Use National Weather Service alerts and local emergency-management notices for present conditions, not this historical comparison.
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.