Natural hazards · Santa Susana

Santa Susana, CA natural hazards

Most of the natural-hazard damage FEMA expects in Santa Susana comes from inland flooding, and overall the risk is very high for a U.S. community. 1 federal disaster brought FEMA money into town.

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

Expected damage

How exposed is Santa Susana?

Very high

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Santa Susana to be higher than in 98% of U.S. communities, mostly from inland flooding and wildfires.

Inland flooding54%Wildfire23%Earthquakes22%

By hazard

What Santa Susana faces

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

Inland flooding

54% of expected damage

Well above average · higher than 97% of U.S. places

Recorded about 2 times a year in the area

Wildfire

23% of expected damage

Well above average · among the top 1% of U.S. places

Earthquakes

22% of expected damage

Well above average · higher than 91% of U.S. places

Lower here

TornadoesHailHeat wavesLandslidesStrong windLightning

Not a risk here

Coastal floodingHurricanesIce stormsWinter weatherCold wavesDroughtAvalanchesTsunamisVolcanic 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 Santa Susana flood?

FEMA's records show no paid flood insurance claims in Santa Susana.

of homes in flood zones
are insured

of all homes
are insured

No community discount. Santa Susana isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Ventura County.

Disasters that hit Santa Susana

1 federal disaster brought FEMA money here

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

Brought FEMA money into Santa SusanaDeclared for Ventura County only

2022

Severe Winter Storms, Flooding, Landslides, and Mudslides

1 household applied for aid $300 aid approved

Ventura County has had 44 natural disasters declared since 1953, most often fires and floods.

Around Santa Susana

Santa Susana and the towns around it

Very lowLowModerateHighVery high

Santa Susanamostly inland floodingVery high

Simi Valleymostly inland floodingVery high

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. Santa Susana is smaller than a census tract, so it shares the figures of the tract around its center.

Money that reached townFlood claims are matched to Santa Susana’s own flood-insurance community; household aid to the registrant’s city; repair grants to Santa Susana. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

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.