Enter any address in Glenn County, California to see its FEMA flood zone
Flooding in Glenn County is characterized primarily by heavy winter storms bringing widespread rain, mountain snow, and river rises. According to the NOAA Storm Events Database over the last 30 years, the county has recorded 30 flood events resulting in 1 death. Recent severe weather includes a major winter storm on February 4, 2024, which brought heavy rain, urban and road nuisance flooding, and strong winds, as well as a series of active storms from December 12 through December 17, 2024, that produced heavy rain, mountain snow, and gusty winds.
National Flood Insurance Program records show claims across multiple zones, indicating risk extends beyond high-risk areas. Zone A accounts for the highest claim volume with 150 claims averaging a payout of $10,776 and an average recorded water depth of 7 inches. Properties in Zone X recorded 18 claims with an average payout of $49,568 and an average recorded water depth of 30 inches. Zone X shaded properties recorded 17 claims averaging $23,116 with an average recorded water depth of 1 inch, while Zone X unshaded properties recorded 10 claims averaging $23,256 with an average recorded water depth of 1 inch.
Homeowners and real estate agents in both designated high-risk riverine areas and moderate-to-low risk zones should pay close attention to these flood risks, as significant water depths and costly claims have occurred outside of primary hazard zones.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
12 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Glenn County, California has recorded 30 flood-related events since 1996 according to NOAA's Storm Events Database. The county has received 21 federal disaster declarations, 9 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1964–2024)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storms, Tornadoes, Flooding, Landslides, And Mudslides | Severe Storm | Jan 31, 2024 |
| Severe Winter Storms, Flooding, Landslides, And Mudslides | Flood | Mar 9, 2023 |
| Severe Winter Storms, Straight-line Winds, Flooding, Landslides, And Mudslides | Severe Storm | Feb 21, 2023 |
| Severe Winter Storms, Flooding, And Mudslides | Flood | Jan 8, 2023 |
| Severe Winter Storms, Flooding, Landslides, And Mudslides | Flood | Dec 27, 2022 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Winter Storms, Flooding, Landslides, And Mudslides | Severe Storm | Feb 24, 2019 |
| Severe Winter Storms, Flooding, And Mudslides | Flood | Feb 1, 2017 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Dec 24, 2025 | 0.00K |
| Flood | Nov 23, 2024 | 0.00K |
| Flood | Dec 14, 2024 | 0.00K |
| Flood | Feb 4, 2024 | 395.00K |
| Flood | Mar 14, 2023 | 0.00K |
| Flood | Jan 14, 2023 | 0.00K |
| Flood | Jan 12, 2023 | 0.00K |
| Flood | Jan 9, 2023 | 0.00K |
| Flood | Mar 4, 2023 | 600.00K |
| Flood | Jan 4, 2023 | 0.00K |
Flood — Dec 24, 2025
A prolonged period of wet weather brought heavy snowfall and strong winds to the Sierra Nevada. Heaviest snowfall was observed from 12/24-12/26 when snow levels came down below the mountain passes. Snowfall measurements over the 12/24-12/26 timeframe were around 2-5 ft per Caltrans, Ski resorts, and UC Berkeley Central Sierra Snow Lab. Southerly wind gusts of 50-80 mph were observed as well acr...
Flood — Nov 23, 2024
Another weather system brought continued periods of heavy mountain snow with mountain travel delays and chain restrictions, widespread rain with flooding impacts, and gusty winds in the from November 22nd through November 26th.
Flood — Dec 14, 2024
Active weather brought periods of heavy mountain snow, rain and gusty winds from December 12th through December 17th as multiple storms moved through the area. The strongest storm moved through over the December 13th through 14th timeframe and brought over 2 to 3 inches of rain, over 2 feet of heavy snow above 5000 feet, and gusty southerly wind gusts of 35 to 65 mph. Numerous downed trees and ...
Flood — Feb 4, 2024
A major winter storm moved in from the south on February 4th, bringing heavy rain, strong winds, thunderstorms and heavy mountain snow through February 7th. Damaging winds brought down trees and caused widespread power outages. Flooding and strong winds resulted in multiple fatalities. Chain controls were observed in the mountains. Heavy rain brought nuisance flooding on roads and urban areas a...
Flood — Mar 14, 2023
A wet system brought periods of heavy rain with flooding. There was 1 to 2 feet of snow accumulated above 6,500 feet, locally higher on some peaks. Heavy rain fell bringing widespread roadway flooding, as well as local mudslides, flash flooding, with evacuations ordered in some areas. Thunderstorms with large hail, strong damaging winds and tornadoes were reported. Strong winds gusting to 55 to...
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 Glenn County, California:
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 Glenn County, California that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with a mortgage from a federally regulated or insured lender, or a federally backed loan, 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.