St. Charles Parish Disaster Risk

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.

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.

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.

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.

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.

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.