Enter any address in Caribou County, Idaho to see its FEMA flood zone
4 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Caribou County, Idaho has recorded 11 flood-related events since 1996 according to NOAA's Storm Events Database, including 3 flash floods and 8 river or area floods. The county has received 5 federal disaster declarations, 1 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1964–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Hurricane Katrina | Hurricane | Aug 29, 2005 |
| Drought | Drought | May 5, 1977 |
| Heavy Rains & Flooding | Flood | Dec 31, 1964 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Jun 1, 2023 | 1.50M |
| Flood | Mar 13, 2018 | 65.00K |
| Flood | Jan 9, 2017 | 0.00K |
| Flood | Feb 4, 2017 | 427.00K |
| Flood | Apr 4, 2017 | 0.00K |
| Flood | Mar 1, 2017 | 42.00K |
| Flood | Feb 22, 2012 | 3.00K |
| Flood | May 1, 2011 | 1.00K |
| Flash Flood | Aug 21, 2004 | 5K |
| Flash Flood | Aug 21, 2004 | — |
Flood — Jun 1, 2023
Extreme snowmelt from heavy snowfall and extreme flows on the Portneuf River caused damage to the Chesterfield Reservoir spillway. The old structure started to deconstruct and makeshift repairs were made to alleviate any significant flooding. Cost to repair the damaged structure were estimated at around 1.5 million dollars.
Flood — Mar 13, 2018
A return to heavy mountain snows in late February and early March added significantly to the snow pack especially in the Upper Snake River Highlands and snow melt and heavy rains occurred sporadically from the middle of the month onward. The worst of the flooding occurred in Clark and Madison which were both declared state disaster areas by the end of the month. Low elevations in the centra...
Flood — Jan 9, 2017
A long dawn out atmospheric river event brought a variety of impacts to southeast Idaho including extremely heavy mountain snow, valley snow then rain on snow leading to flooding and roads covered with ice in the Snake River Plain, and many mountain avalanches. Many roads were closed for extended periods due to the heavy snow and avalanches. Custer County was declared a disaster area due to...
Flood — Feb 4, 2017
A trend toward above normal temperatures in February after extreme snowfall amounts in both December and January led to extensive flooding issues during the entirety of the month. The brunt of the flooding occurred in Cassia, Minidoka, Jefferson, Lincoln and Bingham Counties but all counties did receive at least minor flooding. The floding began February 4th and continued to affect low lying...
Flood — Apr 4, 2017
Some flooding continued throughout the month but not as severe as previous months or the future river flooding in May and June.
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Caribou County, Idaho:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Caribou County, Idaho that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.