riskbycounty
FEMA National Risk Index

St. Charles Parish Disaster Risk

St. Charles Parish, Louisiana

FEMA Risk Rating

Relatively Moderate

National Percentile

85th

of 3,144 counties

State Rank

#20

of 64 (1 = highest risk)

Flood Risk

95th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Relatively High

Higher than 95% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Very Low

Higher than 18% of US counties

Tornado

Tornado and severe thunderstorm risk

Relatively Low

Higher than 77% of US counties

Earthquake

Seismic activity and ground shaking risk

Very Low

Higher than 35% of US counties

Hurricane

Tropical cyclone and hurricane risk

Relatively High

Higher than 96% of US counties

Risk Advisory: St. Charles Parish

Risk Verdict

St. Charles Parish has a relatively moderate overall disaster risk profile, scoring in the 85th percentile nationally. While not in the highest tier, this county faces meaningful hazard exposure. Residents are encouraged to understand their specific risks and maintain emergency supplies.

Hazard Breakdown

Hurricane risk is the dominant hazard for St. Charles Parish, scoring in the 96th percentile nationally. It is followed by flood risk at the 95th percentile. Additional hazards include tornado (77th), earthquake (35th), wildfire (18th).

Preparedness Context

With hurricane risk as the top concern, St. Charles Parish residents should know your evacuation route, stockpile supplies for at least 72 hours, and review your homeowners and flood insurance policies annually. Secondary risks such as flood also warrant attention in household and community preparedness planning. FEMA recommends all households maintain at least 72 hours of food, water, and medication supplies regardless of specific hazard exposure.

Regional Context

St. Charles Parish is significantly riskier than the average county in Louisiana. Its composite risk score is 22.7 points higher than the state average, meaning residents face above-average exposure to natural hazards compared to their neighbors.

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Frequently Asked Questions

What is the natural disaster risk in St. Charles Parish, LA?
St. Charles Parish has a FEMA National Risk Index rating of Relatively Moderate, placing it in the 85th percentile nationally out of 3,144 counties. This composite score reflects the county's overall exposure to natural hazards including floods, wildfires, tornadoes, earthquakes, and hurricanes, weighted by expected annual loss and social vulnerability.
What types of natural hazards affect St. Charles Parish?
St. Charles Parish is evaluated for five major natural hazard types: hurricane (96th percentile), flooding (95th percentile), tornado (77th percentile), earthquake (35th percentile), wildfire (18th percentile). The highest-risk hazard is hurricane at the 96th percentile nationally. These scores are derived from FEMA's National Risk Index, which analyzes expected annual loss, social vulnerability, and community resilience for each hazard type.
How does St. Charles Parish risk compare to the Louisiana average?
St. Charles Parish's composite risk percentile is 85th, compared to the Louisiana state average of 62th percentile. The state's overall risk rating is Relatively Low. This means St. Charles Parish faces higher natural disaster risk than the typical county in Louisiana.
Is St. Charles Parish at risk for hurricane?
Yes, St. Charles Parish's hurricane risk is at the 96th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, St. Charles Parish is at the 95th percentile.
How is natural disaster risk measured?
FEMA's National Risk Index (NRI) calculates risk scores for 18 natural hazard types across all U.S. counties and census tracts. The composite score combines Expected Annual Loss (estimated dollar losses from each hazard), Social Vulnerability (demographic factors affecting disaster impact), and Community Resilience (ability to recover). Percentile scores rank each county against all 3,144 U.S. counties, and risk ratings range from Very Low to Very High.
Why is St. Charles Parish higher risk than average?
St. Charles Parish's composite risk score of 85th percentile is above the Louisiana state average of 62th percentile. This elevated risk is driven by hurricane exposure (96th percentile), along with flooding and tornado risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.

Counties with Similar Risk

Vermilion Parish

Louisiana

-0.3

Relatively Moderate

85th percentile

Washington Parish

Louisiana

+0.5

Relatively Moderate

86th percentile

Rapides Parish

Louisiana

-0.8

Relatively Moderate

84th percentile

By Logan Johnson, Founder & Data EditorUpdated Reviewed by Logan Johnson, Founder & Data Editor

Data Source

Risk data sourced from the FEMA National Risk Index (NRI). Risk scores are relative rankings (0–100) across all US counties — not absolute risk measures. Higher scores indicate higher relative risk compared to other counties.

Disclaimer: This data is informational only. It is not financial, insurance, or legal advice. Always consult a qualified professional before making insurance or real estate decisions.

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