St. Clair County Disaster Risk
St. Clair County, Missouri
FEMA Risk Rating
Very Low
NRI score (0–100 relative scale)
25.6
FEMA composite county value
State Rank
#93
of 115, sorted high to low by RiskByCounty
Flood NRI score
35.8
higher coastal/inland value
Hazard Risk Breakdown
Five selected hazard categories out of FEMA's 18. Values are FEMA NRI v1.20 scores on a 0–100 relative scale.
Wildfire
53.1 / 100
Earthquake
41.7 / 100
Tornado
36.1 / 100
Flood
35.8 / 100
Higher of FEMA Coastal Flooding (Not available) and Inland Flooding (35.8) NRI scores.
Hurricane
20.2 / 100
FEMA NRI data summary
Selected hazard scores for St. Clair County
Among the five hazard categories displayed by RiskByCounty, wildfire has the highest NRI score for this county.
- Wildfire
- 53.1
- Earthquake
- 41.7
- Tornado
- 36.1
- Flood
- 35.8
- Hurricane
- 20.2
Higher of FEMA Coastal Flooding and Inland Flooding NRI scores
- Displayed flood score
- 35.8
- Coastal Flooding
- Not available
- Inland Flooding
- 35.8
These five categories are a selected subset of FEMA's 18 natural hazards. FEMA's composite score and official rating are separate fields in the National Risk Index dataset.
FEMA National Risk Index documentationOfficial Ready.gov resource
Continue to Ready.gov for federal emergency-planning information maintained outside RiskByCounty.
Frequently Asked Questions
How many Missouri county records are included?
Which FEMA county ratings appear in Missouri?
How complete are the five selected hazard fields for Missouri?
What FEMA NRI information is available for St. Clair County, MO?
Which selected hazard scores are shown for St. Clair County?
How is flood displayed for St. Clair County?
Published by RiskByCounty
County summaries are deterministic transformations of frozen FEMA county fields. No external subject-matter reviewer is credited.
Published · Updated
Data Source
County data sourced from FEMA National Risk Index v1.20, released December 2025. Values are labeled NRI score (0–100 relative scale). RiskByCounty displays five selected hazard categories out of FEMA's 18; flood is the higher of the Coastal Flooding and Inland Flooding source scores.
RiskByCounty presents county-level source fields and deterministic arithmetic summaries.