Natural Disaster Risk in St. Clair County
Illinois
Risk Summary for St. Clair County
St. Clair County scores 7.4/10 (High risk), above the U.S. average of 4.5. The leading hazard is Earthquake.
Top Hazards
All 18 Hazard Scores
How it compares
Live Conditions
🏠 What this means for insurance
Above-average risk — check your policy limits
Standard homeowners insurance may not fully cover all hazards rated highly in this area. Verify that your policy includes adequate coverage for the top local hazards, and ask your insurer about specific endorsements or separate policies (e.g., flood, earthquake).
This is general information only. Consult a licensed insurance professional for advice specific to your property.
Natural Hazard Profile: St. Clair County, Illinois
St. Clair County is located in the United States in Illinois, home to roughly 257,200 residents. The county experiences bitterly cold winters and hot, humid summers, with a severe thunderstorm and tornado season each spring shaping the natural hazards faced by its communities. FEMA assesses risk at this county level, providing the baseline for every city and ZIP code within its boundaries.
According to FEMA's National Risk Index, St. Clair County carries an overall risk score of 7.4/10, placing it in the high category. Earthquake risk stands out in the local hazard profile, driven by proximity to fault systems with a history of significant ground movement. The area also faces notable exposure to hail and heat.
St. Clair County's risk score, considerably above the 5.8/10 state average and well above the U.S. national average of 4.5/10. Of the 18 hazard categories tracked by FEMA for St. Clair County, the highest-scoring are earthquake, hail, and heat. These scores reflect county-level data and represent the baseline risk that all communities in the county share.
With a high natural disaster risk rating, St. Clair County residents benefit from taking preparedness seriously. Reviewing insurance coverage for earthquake and secondary hazards, registering for emergency alerts, and maintaining a household emergency kit are practical steps that can significantly reduce impact during a major event.
What this means for St. Clair County: Earthquake preparedness
- Standard homeowners insurance excludes earthquake damage — a separate earthquake policy or endorsement is needed.
- Secure heavy furniture, water heaters, and shelving to wall studs to reduce injury and damage during shaking.
- Identify "drop, cover, and hold on" spots in each room and keep an emergency kit with water for at least 72 hours.
Cities in St. Clair County
ZIP codes in St. Clair County
Data source: FEMA National Risk Index (NRI). Scores normalized to 1–10 across all US counties. For informational purposes only.