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

Trinity County Disaster Risk

Trinity County, California

FEMA Risk Rating

Relatively Low

National Percentile

79th

of 3,144 counties

State Rank

#50

of 58 (1 = highest risk)

Flood Risk

79th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Relatively Low

Higher than 79% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Relatively High

Higher than 99% of US counties

Tornado

Tornado and severe thunderstorm risk

Very Low

Higher than 5% of US counties

Earthquake

Seismic activity and ground shaking risk

Moderate

Higher than 85% of US counties

Risk Overview

About Natural Disaster Risk in Trinity County, California

Trinity shows California's lower-risk profile

Trinity County's composite risk score of 79.45 earns a Relatively Low rating, placing it well below the national average. Despite this advantage, significant hazards remain and shouldn't be dismissed.

Among California's safer counties

Trinity's 79.45 score falls well below California's 88.72 state average, ranking it in the lower third of state risk exposure. The county benefits from remote location and lower population density in hazard zones.

Safest in the North State trio

Trinity (79.45) ranks notably lower than both Tehama (88.90) and Sutter (83.72), making it the least at-risk county in the immediate region. Wildfire risk remains high at 98.51, but other hazards are comparatively muted.

Wildfire dominates your hazard landscape

Wildfire risk at 98.51 stands as Trinity's overwhelming concern, nearly matching state peak levels. Flood risk (79.04) and earthquake risk (84.96) are secondary but still material threats, particularly in valley communities.

Wildfire coverage comes first

Wildfire insurance is your priority—Trinity's remote forests create extreme fire exposure despite lower overall county risk. Add earthquake insurance to cover seismic damage, and verify your insurer covers flood scenarios in riparian zones.

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

Preparedness Guide

What to Prepare for in Trinity County

Top Hazards by Exposure

  1. #1
    WildfirePrepare
    99th percentile
  2. #2
    EarthquakePrepare
    85th percentile
  3. #3
    FloodPrepare
    79th percentile

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

Local Resources

Risk Advisory: Trinity County

Risk Verdict

With a national percentile rank of 79th, Trinity County faces below-average hazard exposure relative to U.S. counties as a whole. Proactive preparedness — not reactive response — is key to managing life in one of the country's higher-risk counties; Trinity County residents should plan accordingly.

Hazard Breakdown

Wildfire risk is Trinity County's dominant natural hazard, ranked at the 99th percentile nationally under FEMA's National Risk Index. Earthquake ranks second at the 85th percentile nationally. Additional tracked hazards include flood (79th percentile), tornado (5th percentile).

Preparedness Context

At the 99th percentile nationally for wildfire risk, Trinity County households benefit from creating defensible space — a buffer of reduced vegetation around structures — and reviewing whether homeowners insurance covers wildfire damage in this region. Alongside wildfire, earthquake at the 85th percentile nationally means a multi-season preparedness mindset — fire season and flood or storm season often require different household plans. Enrolling in the county's wireless emergency alert system and keeping a vehicle at least half-full during peak fire season are low-cost habits that dramatically reduce evacuation lag time for Trinity County residents.

Regional Context

Trinity County falls 9.3 points below California's typical county risk level, making it one of the safer natural-hazard environments in the state.

Is your household prepared for Trinity 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 Trinity County, CA?
Trinity County has a FEMA National Risk Index rating of Relatively Low, placing it in the 79th 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 Trinity County?
Trinity County is evaluated for five major natural hazard types: wildfire (99th percentile), earthquake (85th percentile), flooding (79th percentile), tornado (5th percentile). The highest-risk hazard is wildfire at the 99th 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 Trinity County risk compare to the California average?
Trinity County's composite risk percentile is 79th, compared to the California state average of 89th percentile. The state's overall risk rating is Relatively Moderate. This means Trinity County faces lower natural disaster risk than the typical county in California.
Is Trinity County at risk for wildfire?
Yes, Trinity County's wildfire risk is at the 99th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Trinity County is at the 79th 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.
Is Trinity County a safe place to live?
Trinity County's composite risk score of 79th percentile is below the California state average of 89th percentile, indicating relatively lower exposure to natural hazards. However, no county is completely risk-free. The primary hazard type is wildfire at the 99th percentile. Residents should still maintain emergency preparedness plans and appropriate insurance coverage.

Counties with Similar Risk

Inyo County

California

-0.1

Relatively Low

79th percentile

Amador County

California

-0.3

Relatively Low

79th percentile

Yuba County

California

+1.4

Relatively Low

81th percentile

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.

Explore more data for Trinity County

Property TaxCost of LivingCrime RateIncomeHealthSchoolsWater QualityWeatherCounty Score