Natural hazards · San Marino

San Marino, CA natural hazards

Most of the natural-hazard damage FEMA expects in San Marino comes from earthquakes, and overall the risk is very high for a U.S. community. 5 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is San Marino?

Very high

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in San Marino to be higher than in 94% of U.S. communities, mostly from earthquakes and inland flooding.

Earthquakes50%Inland flooding50%

By hazard

What San Marino faces

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

Earthquakes

50% of expected damage

Well above average · higher than 96% of U.S. places

Inland flooding

50% of expected damage

Well above average · higher than 95% of U.S. places

Recorded about 4 times a year in the area

Lower here

TornadoesHailWinter weatherHeat wavesWildfireLandslidesStrong windLightningDrought

Not a risk here

Coastal floodingHurricanesIce stormsCold wavesAvalanchesTsunamisVolcanic 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 San Marino flood?

FEMA's records show no paid flood insurance claims in San Marino.

of homes in flood zones
are insured

of all homes
are insured

No community discount. San Marino 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 San Marino

5 federal disasters brought FEMA money here

Disasters the President declared that paid out in San Marino itself: aid to households, or repair grants to the City of San Marino.

Brought FEMA money into San MarinoDeclared for Los Angeles County only

2025

Wildfires and Straight-Line Winds

99 households applied for aid $8K aid approved $13K to the City of San Marino for repairs

2020

Wildfires

3 households applied for aid

2017

Wildfires, Flooding, Mudflows, and Debris Flows

1 household applied for aid

2004

Severe Storms, Flooding, Debris Flows, and Mudslides

5 households applied for aid $521 aid approved $5K to the City of San Marino for repairs

2003

Wildfires, Flooding, Mudflow and Debris Flow Directly Related T

1 household applied for aid

Los Angeles County has had 74 natural disasters declared since 1953, most often fires and floods.

Around San Marino

San Marino and the towns around it

Very lowLowModerateHighVery high

San Gabrielmostly inland floodingVery high

East San Gabrielmostly earthquakesVery high

San Marinomostly earthquakesVery high

San Pasqualmostly earthquakesVery high

Pasadenamostly earthquakesVery high

South Pasadenamostly earthquakesVery high

Alhambramostly earthquakesVery 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. San Marino covers 3 census tracts, combined by population.

Money that reached townFlood claims are matched to San Marino’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of San Marino. 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 San Marino total about $17.4M 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.