FEMA expects more hazard damage per building in Rancho Mission Viejo than almost anywhere in the U.S., mostly from wildfire
On FEMA’s National Risk Index, Rancho Mission Viejo gets a D− for hazard risk: among the highest expected damage per building of U.S. towns, #822 of 847 in California. Most of that expected damage is wildfire (66%), then river and rain flooding (25%). 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
What Rancho Mission Viejo faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
Wildfire
River and rain flooding
Earthquakes
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.
What’s behind Rancho Mission Viejo’s grade
Wildfire is 66% of the building damage FEMA expects in Rancho Mission Viejo, and Rancho Mission Viejo’s rate of wildfire damage is in the top 1% of U.S. census tracts. Next is river and rain flooding at 25% (higher than 83% of U.S. census tracts).
D− #822 of 847 in California; among the highest expected damage per building of U.S. towns (21,298).
Rancho Mission Viejo’s residents live in 3 census tracts; FEMA’s figures are combined by where they live.
The typical California town has higher expected damage than 92% of U.S. towns; within the state, Rancho Mission Viejo has more expected damage per building than 97% of California towns.
In dollars, FEMA expects about $17.1M a year in losses across Rancho Mission Viejo: $16.0M to buildings, the rest to people and crops.
Does Rancho Mission Viejo flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Rancho Mission Viejo. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Rancho Mission Viejo isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Orange County.The storms Rancho Mission Viejo remembers
None of the 27 disasters declared for Orange County shows FEMA aid or repair money reaching Rancho Mission Viejo itself in FEMA’s records, so these are its biggest flood-claim years.
Orange County has had 27 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 12 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in Orange County, 2002–2026.
Rancho Mission Viejo and its neighbors
Rancho Mission Viejo is 6th of the 6 graded towns here, from least expected damage per building to most. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| San Clemente | Cmore damage than 74% | river and rain flooding | 57 |
| Coto de Caza | C−more damage than 84% | river and rain flooding | 5 |
| Ladera Ranch | Dmore damage than 86% | river and rain flooding | — |
| Las Flores | Dmore damage than 90% | river and rain flooding | — |
| San Juan Capistrano | D−more damage than 98% | river and rain flooding | 17 |
| Rancho Mission Viejo | D−among the highest damage | wildfire | 0 |
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.
Get ready for what Rancho Mission Viejo faces
A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.
- 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.
- 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.
- Drop, cover and hold on.
- Strap tall furniture and the water heater to the wall.
- Know how to shut off the gas.
- 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.
Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.
Questions about natural hazards in Rancho Mission Viejo
Is Rancho Mission Viejo at risk for natural disasters?
On FEMA’s National Risk Index, Rancho Mission Viejo has among the highest expected damage per building of U.S. towns: D− for hazard risk, #822 of 847 in California. Most of the expected damage is wildfire (66%) and river and rain flooding (25%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Is Rancho Mission Viejo 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 Orange County, 19% of homes in mapped flood zones carry federal flood insurance, and 1.0% of all homes do.
How much is flood insurance in Rancho Mission Viejo?
FEMA’s Community Rating System list shows no discount for Rancho Mission Viejo’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Is Rancho Mission Viejo at risk from wildfire?
It is the largest share of the building damage FEMA expects here (66%), and Rancho Mission Viejo’s rate for it is in the top 1% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Rancho Mission Viejo.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Rancho Mission Viejo’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.