Natural hazards · Stevenson Ranch

Stevenson Ranch, CA natural hazards

Most of the natural-hazard damage FEMA expects in Stevenson Ranch comes from earthquakes, and overall the risk is very high for a U.S. community. 6 federal disasters brought FEMA money into town.

FEMA National Risk Index, December 2025 · OpenFEMA claims, aid & declarations
Expected damage

How exposed is Stevenson Ranch?

90
Very high
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Stevenson Ranch to be higher than in 90% of U.S. communities, mostly from earthquakes and inland flooding.

Earthquakes48%Inland flooding47%Everything else4%
By hazard

What Stevenson Ranch faces

Each hazard’s share of the damage FEMA expects here, and how that compares with the rest of the country.

Earthquakes

48% of expected damage
Well above average · higher than 94% of U.S. places

Inland flooding

47% of expected damage
Well above average · higher than 88% of U.S. places
Recorded about 4 times a year in the area

Lower here

TornadoesHailWinter weatherCold wavesHeat wavesWildfireLandslidesStrong windLightningDrought

Not a risk here

Coastal floodingHurricanesIce stormsAvalanchesTsunamisVolcanic activity
Flood risk changes street by street. Check a specific address on FEMA’s flood map, and ask about flood insurance before you buy.
Flood insurance claims

Does Stevenson Ranch flood?

FEMA's records show no paid flood insurance claims in Stevenson Ranch.

of homes in flood zones
are insured
of all homes
are insured
No community discount. Stevenson Ranch isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Los Angeles County.
Disasters that hit Stevenson Ranch

6 federal disasters brought FEMA money here

Disasters the President declared that paid out in Stevenson Ranch itself: aid to households, or repair grants to Stevenson Ranch.

Brought FEMA money into Stevenson RanchDeclared for Los Angeles County only
2025

Wildfires and Straight-Line Winds

67 households applied for aid $2K aid approved
2020

Wildfires

4 households applied for aid
2018

Wildfires

1 household applied for aid
2007

Wildfires, Flooding, Mud Flows, and Debris Flows

2 households applied for aid
2004

Severe Storms, Flooding, Debris Flows, and Mudslides

5 households applied for aid $3K aid approved
2003

Wildfires, Flooding, Mudflow and Debris Flow Directly Related T

9 households applied for aid
Los Angeles County has had 74 natural disasters declared since 1953, most often fires and floods.
About these numbers

How to read this page

An average, not a forecastFEMA’s National Risk Index estimates the damage 18 kinds of natural hazards cause in a typical year, from decades of records and models. A quiet decade can follow a bad year.
Compared by rate“Higher than N%” compares yearly damage as a share of what’s here, so a big city isn’t rated riskier just for having more buildings. Stevenson Ranch covers 1 census tract, combined by population.
Money that reached townFlood claims are matched to Stevenson Ranch’s own flood-insurance community; household aid to the registrant’s city; repair grants to Stevenson Ranch. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

FEMA’s expected losses across Stevenson Ranch total about $4.4M a year, counting buildings, people and crops.

Sources: FEMA National Risk Index (December 2025); OpenFEMA: NFIP redacted claims, multiple-loss properties, community status book and residential penetration rates, housing assistance (owners and renters), public assistance funded projects, hazard mitigation properties and disaster declarations. Census tracts: U.S. Census Bureau.

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/19 · 2025-01-01