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FEMA flood zones · Wyoming

Hot Springs County, Wyoming Flood Zone Map

1 flood insurance claims·$0 paid·1 federal flood & hurricane disasters

Less than 1% of Hot Springs County’s area is in FEMA’s high-risk flood zones.

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 Hot Springs County, Wyoming. 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.

In their words

3 NOAA storm reports from Hot Springs County describe what happened, in the words of the forecasters who covered it. Read the Wyoming flood stories →

Federal disasters

4 federal disaster declarations since 1978, 1 of them floods, coastal storms or hurricanes.

DisasterBegan
Red Canyon FireAug 15, 2025
Severe Storms, Flooding & MudslidesMay 29, 1978

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

Recorded flood events

10 since 1996: 8 flash floods and 2 river or area floods.

EventDateDamage
Flash FloodJul 4, 2019—
Flash FloodMay 24, 2015—
Flash FloodMay 24, 2015$1.5M
Flash FloodJul 2, 2009$75,000
Flash FloodJul 1, 2006—
Flash FloodJul 10, 2001—
Flash FloodAug 28, 1999—
FloodJan 29, 1996$2,000

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

From the storm reports

Flash Flood · Jul 4, 2019. With a stationary boundary remaining over the area, there were two rounds of severe weather across central Wyoming on Independence Day. One storm developed in the lee of the Wind River Range and strengthened as it moved eastward toward Natrona County, Wyoming. Ping pong ball sized hail was reported north of Casper, Wyoming. A second round of thunderstorms developed in the afternoon and evening hours. There were mo…

Flash Flood · May 24, 2015. A slow-moving upper level low south of Wyoming sent waves of moisture northward over central and eastern Wyoming during the Memorial Day holiday weekend. Measured and estimated rainfall totals ranged from two to around five inches. This resulted in flooding and flash flooding in several areas. Johnson County saw significant flooding along the tributaries and main stem of the Powder River and around Buffalo. The gr…

Flash Flood · Jul 2, 2009. Severe thunderstorms produced flash flooding northwest of Thermopolis along with a swath of quarter sized hail that stretched into town.

Flash Flood · Jul 1, 2006. A trained spotter reported Red Canyon Creek flowing out of its banks southwest of Thermopolis. Heavy rain also produced several minor rock and mud slides in the Wind River Canyon. NWS radar estimated two to four inches of rain fell on mountainous slopes above Red Canyon Creek.

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 Hot Springs County

If a building in Hot Springs 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.