Natural hazards · August

August, CA natural hazards

Most of the natural-hazard damage FEMA expects in August comes from earthquakes, and overall the risk is moderate for a U.S. community.

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

Expected damage

How exposed is August?

Moderate

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in August to be higher than in 47% of U.S. communities, mostly from earthquakes.

Earthquakes83%Inland flooding11%Everything else5%

By hazard

What August faces

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

Earthquakes

83% of expected damage

Well above average · higher than 90% of U.S. places

Inland flooding

11% of expected damage

Well below average · higher than 5% of U.S. places

Recorded about once a year in the area

Lower here

TornadoesHailWinter weatherHeat wavesWildfireLandslidesStrong windLightningDroughtVolcanic activity

Not a risk here

Coastal floodingHurricanesIce stormsCold wavesAvalanchesTsunamis

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 August flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: San Joaquin County.

Disasters that hit August

Federal disasters declared here

None of the disasters declared for San Joaquin County shows FEMA aid or repair money reaching August itself in FEMA’s records.

Brought FEMA money into AugustDeclared for San Joaquin County only

San Joaquin County has had 23 natural disasters declared since 1953, most often floods and severe storms.

Around August

August and the towns around it

Very lowLowModerateHighVery high

Stocktonmostly earthquakesModerate

Augustmostly earthquakesModerate

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. August covers 2 census tracts, combined by population.

Money that reached townFlood claims are matched to August’s own flood-insurance community; household aid to the registrant’s city; repair grants to August. 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 August total about $2.8M 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.