FEMA flood zones · California

Inyo County, California Flood Zone Map

4 flood insurance claims·$11,669 paid·8 federal flood & hurricane disasters

5% of Inyo County’s area is in FEMA’s high-risk flood zones, and another 1% in shaded X (mostly the 0.2% floodplain and areas behind levees).

Share of the whole county outline, rivers and lakes included; parts FEMA hasn’t mapped count as zero.

Coastal high risk (V, VE)FloodwayHigh risk (A, AE)Moderate (X, 500-year)Minimal (X)Undetermined (D)

Shaded areas are FEMA’s mapped flood hazard zones in and around Inyo County, California. Zoomed out they are simplified; at street level the map switches to FEMA’s exact layer. Tap anywhere to check that spot, or search an address above.

How Inyo County floods

Flash flooding from summer thunderstorms and slow-moving weather systems dominates the flood risk profile in Inyo County. Over the last 30 years, the National Oceanic and Atmospheric Administration recorded 229 flash flood events resulting in two deaths, alongside 24 standard flood events.

Recent occurrences illustrate these weather patterns. In February 2025, low pressure directed an atmospheric river into the region, bringing moderate to heavy rain to lower elevations and heavy snow to the mountains. Later that year, in June 2025, an upper-level low pulled moisture from the remnants of Tropical Storm Alvin into the Desert Southwest, fueling thunderstorms that produced severe weather and flash flooding.

Federal Emergency Management Agency records show limited National Flood Insurance Program claim history, consisting of three claims in unknown zones with an average payout of $3,804 and an average recorded water depth of 2 inches, and one claim in an unshaded Zone X with an average payout of $4,062 and an average recorded water depth of 0 inches. Homeowners and real estate agents in unmapped, unknown, or unshaded zones should pay the most attention, as historical data shows flood impacts can still occur outside traditional mapped high-risk areas.

Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.

How deep the water got

outlet80″ door12″24″36″48″60″72″84″

In flood insurance claims here that reported a flood depth, the average was 2 inches.

Drawn to scale against an 80-inch door. Even a few inches soaks flooring, the bottom of the drywall and anything plugged in near the floor.

Average of the depths reported on claims (zero and implausible values left out); FEMA’s record doesn’t say exactly where each depth was measured. Source: OpenFEMA NFIP claims.

Flood claims, year by year

The worst year was 1983, with 1 claims and $5,000 paid.

1982: 1 claims1983: 1 claims1984: 1 claims2012: 1 claims1980199020002010

Bar height is scaled by square root so ordinary years stay visible next to the worst one. NFIP claims by year of loss. Source: OpenFEMA.

In their words

1 NOAA storm reports from Inyo County describe what happened, in the words of the forecasters who covered it. Read the California flood stories →

Federal disasters

16 federal disaster declarations since 1967, 8 of them floods, coastal storms or hurricanes.

DisasterBegan
Tropical Storm HilaryAug 19, 2023
Severe Winter Storms, Flooding, Landslides, And MudslidesMar 9, 2023
Severe Winter Storms, Straight-line Winds, Flooding, Landslides, And MudslidesFeb 21, 2023
Severe Winter Storms, Flooding, Landslides, And MudslidesDec 27, 2022
Severe Winter Storms, Flooding, And MudslidesJan 18, 2017
Severe Winter Storms, Flooding, And Debris And Mud FlowsDec 17, 2010
Inyo Fire ComplexJul 7, 2007
Hurricane Katrina EvacuationAug 29, 2005

Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.

Recorded flood events

253 since 1996: 229 flash floods and 24 river or area floods.

EventDateDamage
FloodSep 29, 2025$1,000
Flash FloodAug 26, 2025$2,000
Flash FloodAug 25, 2025$5,000
Flash FloodNov 21, 2025$2,000
Flash FloodSep 19, 2025$20,000
Flash FloodNov 18, 2025$2,000
Flash FloodNov 15, 2025$100,000
Flash FloodNov 15, 2025$5,000

— = no damage estimate in the record. Source: NOAA Storm Events Database.

From the storm reports

Flood · Sep 29, 2025. Low pressure moved very slowly east from the eastern Pacific across the Mojave Desert, triggering scattered thunderstorms for a few days. Several storms produced severe weather and flash flooding.

Flash Flood · Aug 26, 2025. Southeasterly flow advected in monsoon moisture, fueling scattered thunderstorms, some of which produced flash flooding and severe winds.

Flash Flood · Aug 25, 2025. Southeasterly flow advected in monsoon moisture, fueling scattered thunderstorms, some of which produced flash flooding and severe winds.

Flash Flood · Nov 21, 2025. The last in a series of low pressure systems moving in from the Pacific brought isolated flooding.

National Weather Service narratives, lightly trimmed. Source: NOAA Storm Events Database.

The zones you’ll see on the map

Every colour on the map above is a place on this drawing: where the ground sits relative to the flood FEMA plans for.

Cross-section of a river floodplainDiagram: a river valley. The floodway is the channel and the land beside it; the 1%-annual-chance flood surface (the base flood elevation) covers the valley floor as zone A or AE; a narrow band higher up is shaded X, the 0.2% floodplain; higher ground is X.0.2% CHANCE A YEAR (500-YEAR)BASE FLOOD ELEVATION · 1% A YEARXAEFloodwayAEX
  1. A / AE Inside the 1%-a-year floodplain: about a 26% chance of flooding over a 30-year mortgage. AE has a mapped base flood elevation; plain A does not.
  2. Floodway The channel and the land beside it that has to be kept clear enough to carry the flood. Building here is tightly limited.
  3. X shaded The 0.2% (500-year) floodplain, plus some levee-protected and very shallow flood areas.
  4. X Outside both lines. No federal requirement to insure, which is not the same as no risk.

Every flood zone code explained →

Flood insurance in Inyo County

If a building in Inyo County is in a high-risk zone (A or V) and its mortgage comes from a federally regulated or insured lender, or is federally backed, flood insurance is required.

Outside those zones it is optional, and often worth having: from 2014 to 2024 nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area. Since Risk Rating 2.0, NFIP premiums are set for each building, so the only reliable price is a quote: FloodSmart.gov or a local agent.