Photo: Eli Pousson · CC BY-SA 2.0FEMA puts Lake Forest’s expected hazard damage per building above that of 88% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Lake Forest gets a D for hazard risk: higher expected damage per building than 88% of U.S. towns, #266 of 847 in California. Most of that expected damage is river and rain flooding (55%), then earthquakes (35%). Flood insurance has paid 7 claims here since 1997.
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 Lake Forest faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
River and rain flooding
Earthquakes
Wildfire
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 Lake Forest’s grade
River and rain flooding is 55% of the building damage FEMA expects in Lake Forest, and Lake Forest’s rate of river and rain flooding damage is higher than 83% of U.S. census tracts. Wildfire adds 10%, at a rate in the top 4% of U.S. census tracts.
D #266 of 847 in California; higher expected damage per building than 88% of U.S. towns (21,298).
Lake Forest’s residents live in 16 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, Lake Forest has less expected damage per building than 69% of California towns.
In dollars, FEMA expects about $44.9M a year in losses across Lake Forest: $41.5M to buildings, the rest to people and crops.
Does Lake Forest flood? Rarely: 7 flood claims since 1997
Every paid claim on a federal flood insurance policy in Lake Forest, from FEMA’s records: 0.2 per 1,000 homes, fewer than 97% of the 13,809 U.S. towns with a flood insurance record.
- The Pineapple Express - Southern2 claims · $4K
- The Winter storm1 claim · $6K
Lake Forest 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.4 federal disasters brought FEMA money to Lake Forest
Disasters that paid out in Lake Forest itself (aid to households or repair grants to the City of Lake Forest), newest first, with that year’s flood claims.
- 2017Wildfires41 households applied for aid$500 aid approved1 flood claim paid that year
- 2010Severe Winter Storms, Flooding, and Debris and Mud Flows$133K to the City of Lake Forest for repairs1 flood claim paid that year
- 2007Wildfires, Flooding, Mud Flows, and Debris Flows3 households applied for aid$82K to the City of Lake Forest for repairs
- 2004Severe Storms, Flooding, Debris Flows, and Mudslides1 households applied for aid$4K aid approved
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 11 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in Orange County, 2002–2022.
Old photos of Lake Forest after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Lake Forest archive →Lake Forest and its neighbors
Lake Forest is 2nd of the 5 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 |
|---|---|---|---|
| Laguna Hills | Dmore damage than 86% | river and rain flooding | 2 |
| Lake Forest | Dmore damage than 88% | river and rain flooding | 7 |
| Mission Viejo | Dmore damage than 89% | river and rain flooding | 14 |
| Irvine | Dmore damage than 92% | river and rain flooding | 29 |
| Trabuco Canyon | D−among the highest damage | wildfire | — |
| Modjeska | — | 714 residents; we grade 1,000+ | |
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 Lake Forest faces
A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.
- 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.
- 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.
- 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 Lake Forest
Is Lake Forest at risk for natural disasters?
On FEMA’s National Risk Index, Lake Forest has higher expected damage per building than 88% of U.S. towns: D for hazard risk, #266 of 847 in California. Most of the expected damage is river and rain flooding (55%) and earthquakes (35%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Lake Forest flood?
Flood insurance has paid 7 claims in Lake Forest since 1997, $34K in all, or 0.2 per 1,000 homes, fewer than 97% of U.S. towns with a flood insurance record. The most claims came from Pineapple Express - Southern (2).
Is Lake Forest 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 Lake Forest?
FEMA’s Community Rating System list shows no discount for Lake Forest’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
What was the biggest storm in Lake Forest?
By FEMA money that reached Lake Forest, Severe Winter Storms, Flooding, and Debris and Mud Flows (2010): $133K to the City of Lake Forest for repairs. By flood claims, Pineapple Express - Southern: 2 paid, $4K.
Is Lake Forest at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (55%), and Lake Forest’s rate for it is higher than 83% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Lake Forest.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Lake Forest’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.