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DHazard risk
Natural hazards in Ladera · FEMA

FEMA expects more hazard damage per building in Ladera than in 95% of U.S. towns, mostly from earthquakes

On FEMA’s National Risk Index, Ladera gets a D for hazard risk: higher expected damage per building than 95% of U.S. towns. Most of that expected damage is earthquakes (64%), then river and rain flooding (26%). FEMA’s files show no paid flood insurance claims here.

Graded on FEMA’s expected yearly building damage per dollar of building value (NRI v1.20, December 2025), weighted by where residents live; flood claims are shown, not graded. How hazard risk is graded

more than 95%of U.S. townsLess damageMoreExpected yearly damage per dollar of building, vs. the 21,298 U.S. towns we grade
By hazard

What Ladera faces

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

Earthquakes

64%of expected building damage
Well above average · in the top 2% of U.S. census tracts

River and rain flooding

26%of expected building damage
Above average · higher than 61% of U.S. census tracts
Recorded about once a year in the area

Wildfire

6%of expected building damage
Well above average · in the top 4% of U.S. census tracts
Smaller shares here
 Landslides top 0% Tornadoes Hail Strong wind Winter storms Heat waves Lightning
FEMA models no building damage here
Coastal floodingHurricanesIce stormsCold wavesAvalanchesTsunamisVolcanic activity

Shares are of FEMA’s expected building damage, the measure the grade uses; ranks compare each hazard’s building-damage rate with all 85,154 U.S. census tracts. In FEMA’s terms, river and rain flooding is FEMA’s “Inland Flooding” (rivers and streams overflowing their banks, or rain overwhelming drainage). FEMA defines coastal flooding as high or rising tides and storm surge, so surge damage is counted there. Drought isn’t listed: FEMA counts its losses in crops only.

Flood risk changes street by street. Check a specific address on FEMA’s flood map, and ask about flood insurance before you buy.
Hazard risk grade

What’s behind Ladera’s grade

Earthquakes are 64% of the building damage FEMA expects in Ladera, and Ladera’s rate of earthquakes damage is in the top 2% of U.S. census tracts. Wildfire adds 6%, at a rate in the top 4% of U.S. census tracts.

Where Ladera sits
Ladera
Least damageMiddleMost damage

D higher expected damage per building than 95% of U.S. towns (21,298).

All of Ladera’s residents live in one census tract; the figures are that tract’s.

What drives the damage to buildings
Earthquakes64%River and rain flooding26%Wildfire6%Everything else5%

In dollars, FEMA expects about $2.5M a year in losses across Ladera: $2.1M to buildings, the rest to people and crops.

Shared tract.All of Ladera’s 1,557 residents (2020 census) live in one census tract, which it shares with Portola Valley town (4,456 residents). FEMA publishes its model by tract, so the rate and the hazard mix are the tract’s, the same for all of them. The flood claims below are the town’s own.
A shared figure. The grade describes the whole tract, not each street in it, and FEMA’s model is an average year for today’s buildings, not a record: the claims below are the record.

How TownRatings grades hazard risk →

Flood insurance claims

Does Ladera flood? No paid flood claims on record

FEMA’s records show no paid flood insurance claims in Ladera. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.

of homes in flood zones are insured
of all homes are insured
No community discount

Ladera 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 Mateo County.
Disasters

The storms Ladera remembers

None of the 19 disasters declared for San Mateo County shows FEMA aid or repair money reaching Ladera itself in FEMA’s records, so these are its biggest flood-claim years.

Disasters declared, by decade
Paid out in LaderaSan Mateo County only

San Mateo County has had 19 natural disasters declared by the President since 1953, most often severe storms, then floods. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.

Also 2 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in San Mateo County, 2010–2020.

Next door

Ladera and its neighbors

Ladera is 2nd of the 2 graded towns here, from least expected damage per building to most. Tap a town to see its hazards.

Portola Valley: hazard risk DPortola ValleyLadera
Lowest fifthSecondMiddleFourthHighest fifth
TownHazard riskMostly (buildings)Flood claims
Portola ValleyDmore damage than 95%earthquakes12
LaderaDmore damage than 95%earthquakes0

Hazard risk = FEMA’s expected yearly building damage per dollar of building value, vs. the 21,298 U.S. towns we grade; the map is shaded by fifths of the same scale. Flood claims = paid federal flood insurance claims on record.

Be ready

Get ready for what Ladera faces

A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.

Earthquakes
  • Drop, cover and hold on.
  • Strap tall furniture and the water heater to the wall.
  • Know how to shut off the gas.
More from Ready.gov ↗
When the river rises
  • Turn around at flooded roads: a foot of moving water can carry off a car.
  • Flood insurance usually takes 30 days to start, so buy it before the forecast.
  • Keep papers and medicines up high, in a grab-and-go bag.
More from Ready.gov ↗
Wildfire
  • Clear dead leaves and brush within 5 feet of the house.
  • Sign up for local alerts and know two ways out.
  • Keep N95 masks for smoky days.
More from Ready.gov ↗
Before you buy or rent
  • Look up the address on FEMA’s flood map.
  • Ask the seller or landlord whether it has ever flooded, and what flood insurance costs there.
  • Get a flood insurance quote early: policies usually start 30 days after you buy.
When a storm is coming
Forecast and alertsWeather →911, the nearest ERSafety →

Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.

Questions about natural hazards in Ladera

Is Ladera at risk for natural disasters?

On FEMA’s National Risk Index, Ladera has higher expected damage per building than 95% of U.S. towns: D for hazard risk. Most of the expected damage is earthquakes (64%) and river and rain flooding (26%). The figures are for the one census tract the town shares with its neighbors. This is FEMA’s model of an average year for today’s buildings, not a forecast.

Is Ladera in a flood zone?

Flood zones are drawn street by street, so the answer depends on the address: look it up on FEMA’s flood map. In San Mateo County, 31% of homes in mapped flood zones carry federal flood insurance, and 1.8% of all homes do.

How much is flood insurance in Ladera?

FEMA’s Community Rating System list shows no discount for Ladera’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.

Is Ladera at risk from earthquakes?

It is the largest share of the building damage FEMA expects here (64%), and Ladera’s rate for it is in the top 2% of U.S. census tracts.

Storm stories

Memories, warnings and help from neighbors in Ladera.

Town Square →
Start the conversation

Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Ladera’s residents lived in the 2020 census; 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. Homes: Census ACS 2020–24. Preparedness tips: Ready.gov. FEMA’s model is an average of expected damage, not a forecast. How hazard risk is graded.