Photo: USEPA Environmental-Protection-Agency · Public domainMore hazard damage per building is expected in Lancaster than in 92% of U.S. towns, led by river and rain flooding
On FEMA’s National Risk Index, Lancaster gets a D for hazard risk: higher expected damage per building than 92% of U.S. towns, #398 of 847 in California. Most of that expected damage is river and rain flooding (50%), then earthquakes (49%). Flood insurance has paid 5 claims here since 1998.
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 Lancaster 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
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 Lancaster’s grade
River and rain flooding is 50% of the building damage FEMA expects in Lancaster, and Lancaster’s rate of river and rain flooding damage is higher than 87% of U.S. census tracts. Earthquakes add 49%, at a rate in the top 7% of U.S. census tracts.
D #398 of 847 in California; higher expected damage per building than 92% of U.S. towns (21,298).
Lancaster’s residents live in 41 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, Lancaster has less expected damage per building than 53% of California towns.
Among the 400 U.S. cities of 100,000 or more, Lancaster has higher expected damage per building than 86% (#344 of 400). Because it is so big, its total expected yearly loss, $92.4M, is the 127th largest of those 400.
Does Lancaster flood? Rarely: 5 flood claims since 1998
Every paid claim on a federal flood insurance policy in Lancaster, from FEMA’s records: 0.1 per 1,000 homes, fewer than 99% of the 13,809 U.S. towns with a flood insurance record.
- The Pineapple Express - Southern1 claim · $5K
Lancaster isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Los Angeles County.5 federal disasters brought FEMA money to Lancaster
Disasters that paid out in Lancaster itself (aid to households or repair grants to the City of Lancaster), newest first, with that year’s flood claims.
- 2025Wildfires and Straight-line Winds584 households applied for aid$1.0M aid approved
- 2010Severe Winter Storms, Flooding, and Debris and Mud Flows$143K to the City of Lancaster for repairs
- 2007Wildfires, Flooding, Mud Flows, and Debris Flows14 households applied for aid$550 aid approved
- 2004Severe Storms, Flooding, Debris Flows, and Mudslides269 households applied for aid$221K aid approved$1.4M to the City of Lancaster for repairs1 flood claim paid that year
- 2003Wildfires, Flooding, Mudflow and Debris Flow Directly Related T313 households applied for aid$118K aid approved1 flood claim paid that year
Los Angeles County has had 40 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 44 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in Los Angeles County, 2002–2025.
Old photos of Lancaster after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Lancaster archive →Lancaster and its neighbors
Lancaster has the lowest expected damage per building of the 4 graded towns here. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Lancaster | Dmore damage than 92% | river and rain flooding | 5 |
| Quartz Hill | Dmore damage than 93% | earthquakes | 14 |
| Palmdale | Dmore damage than 93% | earthquakes | 10 |
| Leona Valley | D−among the highest damage | wildfire | — |
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 Lancaster 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.
- 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 Lancaster
Is Lancaster at risk for natural disasters?
On FEMA’s National Risk Index, Lancaster has higher expected damage per building than 92% of U.S. towns: D for hazard risk, #398 of 847 in California. Most of the expected damage is river and rain flooding (50%) and earthquakes (49%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Lancaster flood?
Flood insurance has paid 5 claims in Lancaster since 1998, $96K in all, or 0.1 per 1,000 homes, fewer than 99% of U.S. towns with a flood insurance record. The most claims came from Pineapple Express - Southern (1).
Is Lancaster 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 Los Angeles County, 33% of homes in mapped flood zones carry federal flood insurance, and 0.5% of all homes do.
How much is flood insurance in Lancaster?
FEMA’s Community Rating System list shows no discount for Lancaster’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 Lancaster?
By FEMA money that reached Lancaster, Severe Storms, Flooding, Debris Flows, and Mudslides (2004): 269 households applied for aid, $221K approved, and $1.4M to the City of Lancaster for repairs. By flood claims, Pineapple Express - Southern: 1 paid, $5K.
Is Lancaster at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (50%), and Lancaster’s rate for it is higher than 87% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Lancaster.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Lancaster’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.