Jefferson Parish Disaster Risk
Jefferson Parish, Louisiana
FEMA Risk Rating
Relatively High
National Percentile
99th
of 3,144 counties
State Rank
#1
of 64 (1 = highest risk)
Flood Risk
96th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively High
Higher than 96% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Very Low
Higher than 27% of US counties
Tornado
Tornado and severe thunderstorm risk
Relatively Low
Higher than 72% of US counties
Earthquake
Seismic activity and ground shaking risk
Relatively Low
Higher than 78% of US counties
Hurricane
Tropical cyclone and hurricane risk
Very High
Higher than 100% of US counties
Risk Overview
About Natural Disaster Risk in Jefferson Parish, Louisiana
Jefferson Parish: High National Hazard Exposure
Jefferson Parish scores 98.66—one of the highest in the nation—and earns a Relatively High risk rating. This places your parish in the top tier of disaster-exposed counties nationwide, driven primarily by its coastal location and major metropolitan infrastructure.
Highest-Risk Parish in Louisiana
Jefferson Parish's composite score of 98.66 far exceeds Louisiana's state average of 62.37 and ranks as the riskiest parish in the state. Your parish faces a uniquely concentrated hazard profile due to its position along the Gulf Coast and the Mississippi River.
Gateway to Louisiana's Riskiest Zone
Neighboring Lafayette Parish scores 95.17 and Livingston Parish scores 94.47—both also extremely high—forming a cluster of maximum-risk parishes in southeast Louisiana. Jefferson Parish sits at the heart of Louisiana's most disaster-prone region.
Hurricane and Flood Risk Are Extreme
Hurricane risk scores 99.79 (nearly the national maximum) and flood risk reaches 95.99, making these the parish's defining hazards. Earthquake risk (78.02) and tornado risk (72.20) add secondary but still significant concerns for residents and property owners.
Comprehensive Coverage Is Non-Negotiable
Jefferson Parish residents must maintain full homeowners coverage with high wind/hurricane deductibles, separate flood insurance (mandatory in FEMA high-risk zones), and consider additional earthquake or named-storm coverage. Review and update your policies annually with an agent familiar with Gulf Coast risks, and document your home's condition for faster claims processing.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Jefferson Parish
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Jefferson Parish
Risk Verdict
At the 99th percentile nationally, Jefferson Parish is among the more hazard-exposed counties in the United States. Proactive preparedness — not reactive response — is key to managing life in one of the country's higher-risk counties; Jefferson Parish residents should plan accordingly.
Hazard Breakdown
Hurricane risk is Jefferson Parish's dominant natural hazard, ranked at the 100th percentile nationally under FEMA's National Risk Index. Flood ranks second at the 96th percentile nationally. Additional tracked hazards include earthquake (78th percentile), tornado (72th percentile), wildfire (27th percentile).
Preparedness Context
At the 100th percentile nationally for hurricane exposure, Jefferson Parish households benefit from reviewing both homeowners and flood insurance coverage before storm season begins — standard policies often exclude storm surge, which is the leading cause of hurricane fatalities. Jefferson Parish's flood exposure at the 96th percentile nationally adds a hazard layer that can persist or intensify after hurricane-force winds have passed, particularly in low-lying inland areas. Hurricane-force winds cause direct property damage, but storm surge causes the majority of hurricane-related deaths. Jefferson Parish households near tidal water or low-elevation areas should verify whether they are in a storm surge risk zone.
Regional Context
At 36.3 points above the Louisiana state average, Jefferson Parish carries meaningfully higher natural disaster exposure than a typical Louisiana county.
Is your household prepared for Jefferson Parish's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Jefferson Parish, LA?
What types of natural hazards affect Jefferson Parish?
How does Jefferson Parish risk compare to the Louisiana average?
Is Jefferson Parish at risk for hurricane?
How is natural disaster risk measured?
Why is Jefferson Parish higher risk than average?
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.