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Natural hazards · Sammamish

Sammamish, WA natural hazards

Most of the natural-hazard damage FEMA expects in Sammamish comes from earthquakes, and overall the risk is high for a U.S. community. Flood insurance has paid 10 claims here since 2006. 8 federal disasters brought FEMA money into town.

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

How exposed is Sammamish?

67
High
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Sammamish to be higher than in 67% of U.S. communities, mostly from earthquakes and inland flooding.

Earthquakes51%Inland flooding46%Everything else3%
By hazard

What Sammamish faces

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

Earthquakes

51% of expected damage
Well above average · higher than 89% of U.S. places

Inland flooding

46% of expected damage
Above average · higher than 59% of U.S. places
Recorded about once every 4 years in the area

Lower here

TornadoesHailIce stormsWinter weatherCold wavesHeat wavesWildfireLandslidesStrong windLightningVolcanic activity

Not a risk here

Coastal floodingHurricanesDroughtAvalanchesTsunamis
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 Sammamish flood?

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

10paid claims since 2006
$262Kpaid to owners
2homes flooded more than once
20062026

Homes that flooded again and again

■ FEMA “severe repetitive loss” (0) ■ flooded 2+ times

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

8 federal disasters brought FEMA money here

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

Brought FEMA money into SammamishDeclared for King County only
2025

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

5 households applied for aid $15K aid approved
2020

Severe Storms, Flooding, Landslides, and Mudslides

$124K to the City of Sammamish for repairs
2017

Severe Winter Storms, Flooding, Landslides, Mudslides

$204K to the City of Sammamish for repairs
2012

Severe Winter Storm, Flooding, Landslides, and Mudslides

$143K to the City of Sammamish for repairs
2008

Severe Winter Storm and Record and Near Record Snow

$49K to the City of Sammamish for repairs
2007

Severe Storms, Flooding, Landslides, and Mudslides

2 households applied for aid $6K aid approved
2006

Severe Winter Storm, Landslides, and Mudslides

$198K to the City of Sammamish for repairs
2006

Severe Storms, Flooding, Landslides, and Mudslides

1 household applied for aid $8K to the City of Sammamish for repairs
King County has had 30 natural disasters declared since 1953, most often floods and severe storms.
Around Sammamish

Sammamish and the towns around it

Issaquah: Very high, mostly earthquakesRedmond: High, mostly earthquakesBellevue: High, mostly earthquakesUnion Hill-Novelty Hill: High, mostly earthquakesKirkland: High, mostly earthquakesCottage Lake: Moderate, mostly earthquakesMedina: Moderate, mostly earthquakesBeaux Arts Village: High, mostly earthquakesNewcastle: High, mostly avalanchesClyde Hill: High, mostly earthquakesMercer Island: High, mostly earthquakesSammamish: High, mostly earthquakes SammamishIssaquahRedmondBellevue
Very lowLowModerateHighVery high
Issaquahmostly earthquakesVery high
Bellevuemostly earthquakesHigh
Redmondmostly earthquakesHigh
Sammamishmostly earthquakesHigh
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. Sammamish covers 12 census tracts, combined by population.
Money that reached townFlood claims are matched to Sammamish’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Sammamish. 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 Sammamish total about $26.3M 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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