FEMA flood zones · Utah

Garfield County, Utah Flood Zone Map

2 flood insurance claims·$14,679 paid·3 federal flood & hurricane disasters

FEMA’s digital flood map shows no high- or moderate-risk zones in Garfield County. That can mean the area was never studied in detail or has no digital map, not that it can’t flood; the county floodplain administrator can say which.

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 Garfield County, Utah. 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 Garfield County floods

Flash flooding from summer thunderstorms dominates the flood risk profile in Garfield County. Over the last 30 years, NOAA records show 135 flash flood events resulting in 3 deaths, compared to only 5 general flood events.

Recent weather patterns illustrate this hazard. In July 2025, a cutoff low placed off the southwest CONUS advected moisture into southern Utah, creating periods of sufficiently heavy rain that resulted in flash flooding over rain-sensitive areas. Similar conditions occurred in September 2025, when a moisture surge and cutoff low produced locally heavy rainfall and flash flooding over the course of several days.

Historical NFIP records reflect limited claims activity, specifically in Zone X_UNSHADED, which recorded 2 claims with an average payout of $7,339 and an average recorded water depth of 1 inch. Homeowners, real estate agents, and journalists should pay the most attention to properties in rain-sensitive areas prone to sudden convective storm runoff and flash flooding.

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 1 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.

In their words

14 NOAA storm reports from Garfield County describe what happened, in the words of the forecasters who covered it. Read the Utah flood stories →

Federal disasters

7 federal disaster declarations since 1977, 3 of them floods, coastal storms or hurricanes.

DisasterBegan
Mammoth FireJun 5, 2021
Severe Winter Storm And FloodingDec 20, 2010
Hurricane Katrina EvacuationAug 29, 2005
Severe Storms, Landslides & FloodingApr 13, 1983
DroughtJan 20, 1977

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

Recorded flood events

140 since 1996: 135 flash floods and 5 river or area floods.

EventDateDamage
Flash FloodSep 29, 2025—
Flash FloodJul 17, 2025—
Flash FloodSep 7, 2025—
Flash FloodJun 6, 2025—
Flash FloodJun 4, 2025—
Flash FloodJun 27, 2024—
FloodJun 26, 2024$20,000
Flash FloodJun 24, 2024—

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

From the storm reports

Flash Flood · Sep 29, 2025. A fairly weak cutoff low slowly ejected northward through the area over the course of several days. This feature in combination with sufficient moisture created an environment that supported several days of shower and thunderstorm development. Some of these storms produced locally heavy rainfall and flash flooding, as well as some strong wind gusts.

Flash Flood · Jul 17, 2025. A weak northern stream shortwave trough moving through the northwest CONUS resulted in the development of high based convection. Some of this convection resulted in strong to severe wind gusts. Additionally, a cutoff low placed off of the southwest CONUS helped advect moisture into southern Utah, leading to convection with periods of sufficiently heavy rain to result in flash flooding over some rain sensitive areas.

Flash Flood · Sep 7, 2025. An early September moisture surge resulted in the return of a more active weather pattern to Utah, including some isolated instances of flash flooding as well as a strong thunderstorm wind gust.

Flash Flood · Jun 6, 2025. The start of the month had several storm systems that brought gusty winds, hail, and flash 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 Garfield County

If a building in Garfield 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.