riskbycounty
FEMA NRI 1.19.0Updated Nov 2023 · Coverage 2014–2023Methodology

Simpson County Disaster Risk

Simpson County, Mississippi

FEMA Risk Rating

Relatively Low

National Percentile

51th

of 3,144 counties

State Rank

#41

of 82 (1 = highest risk)

Flood Risk

52th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Relatively Low

Higher than 52% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Relatively Low

Higher than 48% of US counties

Tornado

Tornado and severe thunderstorm risk

Relatively Low

Higher than 77% of US counties

Earthquake

Seismic activity and ground shaking risk

Relatively Low

Higher than 44% of US counties

Hurricane

Tropical cyclone and hurricane risk

Relatively Low

Higher than 81% of US counties

Risk Overview

About Natural Disaster Risk in Simpson County, Mississippi

Simpson County aligns with national risk average

Simpson County scores 50.95 on the composite risk scale, essentially matching the national average and indicating moderate, balanced hazard exposure. The county's hurricane risk of 80.60 and tornado risk of 76.72 substantially exceed national norms, yet flood and earthquake risks remain closer to average. This profile suggests Simpson residents should focus preparedness on wind-driven storm hazards.

Simpson County ranks nearly at state average

Simpson County's 50.95 composite score virtually matches Mississippi's state average of 50.94, placing it precisely in the middle of the state's hazard distribution. The county's 80.60 hurricane risk exceeds state average, while its 76.72 tornado risk aligns closely with typical Mississippi exposure. Simpson's profile represents the archetypal mid-tier Mississippi county for natural disaster risk.

Simpson County shares risk profile with nearby areas

Simpson County's 50.95 composite score closely mirrors Scott County's 55.88 to the east, both counties facing similar wind-driven storm exposure with hurricane risks around 80. However, Simpson ranks substantially safer than Rankin County to the south (84.99), which faces dramatically higher tornado risk. Simpson's moderate positioning reflects its central location among counties with varying hazard profiles.

Hurricanes and tornadoes dominate Simpson's threats

Simpson County residents face hurricane risk of 80.60 and tornado risk of 76.72—two major wind hazards that substantially exceed national averages and demand serious preparation. Flood risk of 51.56 adds a meaningful secondary concern, particularly during spring storms and tropical systems. These three hazards together define the county's natural disaster landscape.

Wind and water protection essential for Simpson County

Homeowners should ensure their properties have reinforced roofing, secure garage doors, and a designated safe room to protect against both tornadoes and hurricane-force winds. Flood insurance is advisable given Simpson's 51.56 flood risk and the frequency of moisture-laden storms in central Mississippi. Schedule annual home inspections to identify vulnerabilities and maintain structural integrity through storm seasons.

Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor

Preparedness Guide

What to Prepare for in Simpson County

Top Hazards by Exposure

  1. #1
    HurricanePrepare
    81th percentile
  2. #2
    TornadoPrepare
    77th percentile
  3. #3
    FloodPrepare
    52th percentile

Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)

Risk Advisory: Simpson County

Risk Verdict

With a national percentile rank of 51th, Simpson County faces below-average hazard exposure relative to U.S. counties as a whole. Above-average risk does not mean imminent danger; it signals that informed, hazard-specific preparedness has high value here.

Hazard Breakdown

Hurricane risk is Simpson County's dominant natural hazard, ranked at the 81th percentile nationally under FEMA's National Risk Index. Tornado ranks second at the 77th percentile nationally. Additional tracked hazards include flood (52th percentile), wildfire (48th percentile), earthquake (44th percentile).

Preparedness Context

At the 81th percentile nationally for hurricane exposure, Simpson County 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. Tornado at the 77th percentile nationally is Simpson County's secondary hazard, often intensified by the same weather systems that produce hurricane conditions. Hurricane-force winds cause direct property damage, but storm surge causes the majority of hurricane-related deaths. Simpson County households near tidal water or low-elevation areas should verify whether they are in a storm surge risk zone.

Regional Context

Simpson County tracks the Mississippi county average closely, sitting 0.0 composite points above the state mean — neither a standout high-risk nor low-risk county within Mississippi.

Is your household prepared for Simpson County's hazards?

Review FEMA's county-specific preparedness checklists and emergency planning guides.

FEMA Ready Guide →

Frequently Asked Questions

What is the natural disaster risk in Simpson County, MS?
Simpson County has a FEMA National Risk Index rating of Relatively Low, placing it in the 51th 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 Simpson County?
Simpson County is evaluated for five major natural hazard types: hurricane (81th percentile), tornado (77th percentile), flooding (52th percentile), wildfire (48th percentile), earthquake (44th percentile). The highest-risk hazard is hurricane at the 81th 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 Simpson County risk compare to the Mississippi average?
Simpson County's composite risk percentile is 51th, compared to the Mississippi state average of 51th percentile. The state's overall risk rating is Relatively Low. This means Simpson County faces higher natural disaster risk than the typical county in Mississippi.
Is Simpson County at risk for hurricane?
Yes, Simpson County's hurricane risk is at the 81th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Simpson County is at the 52th 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 Simpson County higher risk than average?
Simpson County's composite risk score of 51th percentile is above the Mississippi state average of 51th percentile. This elevated risk is driven by hurricane exposure (81th percentile), along with tornado and flooding risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.
By Evan Brooks, Data EditorUpdated Reviewed by Evan Brooks, 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.