Natural hazards · Palo Alto

Palo Alto, CA natural hazards

Most of the natural-hazard damage FEMA expects in Palo Alto comes from earthquakes, and overall the risk is very high for a U.S. community. Flood insurance has paid 376 claims here since 1980. 3 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Palo Alto?

Very high

vs. U.S. communities

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

Earthquakes59%Inland flooding40%Everything else1%

By hazard

What Palo Alto faces

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

Earthquakes

59% of expected damage

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

Inland flooding

40% of expected damage

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

Recorded about 2 times a year in the area

Lower here

Coastal floodingTornadoesHailHeat wavesWildfireLandslidesStrong windLightningDroughtTsunamis

Not a risk here

HurricanesIce stormsWinter weatherCold wavesAvalanchesVolcanic 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 Palo Alto flood?

Every paid claim on a federal flood insurance policy in Palo Alto, from FEMA’s records.

376paid claims since 1980

$9.4Mpaid to owners

6homes flooded more than once

19802026

Biggest named events

Pineapple Express - Southern: 339 claims, $8.4M
California Atmospheric River: 7 claims, $435K

Homes that flooded again and again

■ FEMA “severe repetitive loss” (1) ■ flooded 2+ times

of homes in flood zones
are insured

of all homes
are insured

🏷️ 20% off flood insurance. Palo Alto is in FEMA’s Community Rating System (class 6) for its flood-proofing work.

Insurance rates: Santa Clara County.

Disasters that hit Palo Alto

3 federal disasters brought FEMA money here

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

Brought FEMA money into Palo AltoDeclared for Santa Clara County only

2023

Severe Winter Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides

$387K to the City of Palo Alto for repairs

2022

Severe Winter Storms, Flooding, Landslides, and Mudslides

25 households applied for aid $40K aid approved $863K to the City of Palo Alto for repairs

2020

Wildfires

54 households applied for aid

Santa Clara County has had 22 natural disasters declared since 1953, most often floods and fires.

Around Palo Alto

Palo Alto and the towns around it

Very lowLowModerateHighVery high

Palo Altomostly earthquakesVery high

Los Altosmostly earthquakesVery high

Portola Valleymostly earthquakesVery high

Menlo Parkmostly earthquakesVery high

Mountain Viewmostly earthquakesVery high

East Palo Altomostly earthquakesVery high

Los Altos Hillsmostly earthquakesVery high

Stanfordmostly 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. Palo Alto covers 15 census tracts, combined by population.

Money that reached townFlood claims are matched to Palo Alto’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Palo Alto. 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 Palo Alto total about $95.0M 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.