Enter any address in Stanislaus County, California to see its FEMA flood zone
River overflow along the Stanislaus River and its tributaries is the dominant flood character for Stanislaus County. Over the past 30 years, NOAA Storm Events data recorded 25 flood events in the county, resulting in 2 fatalities. Recent events include flooding in January 2023, when a major winter storm brought heavy rain and renewed flooding of waterways, and February 2024, when a significant storm caused widespread flooding on roads and in urban areas, as well as rises to rivers, creeks, and streams.
National Flood Insurance Program (NFIP) claims data shows that properties in Zone A, which typically have a Base Flood Elevation (BFE) of 0, have experienced the highest number of claims. However, properties in Zone X_SHADED, despite fewer claims, have seen higher average payouts and water depths. Homeowners in Zone A, as well as those in Zone X_SHADED, should pay particular attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
9 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Stanislaus County, California has recorded 25 flood-related events since 1996 according to NOAA's Storm Events Database. The county has received 20 federal disaster declarations, 7 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1964–2023)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| 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 |
| Scu Ligtning Complex Fire | Fire | Aug 20, 2020 |
| Wildfires | Fire | Aug 14, 2020 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Winter Storms, Flooding, And Mudslides | Flood | Feb 1, 2017 |
| Severe Freeze | Freezing | Jan 11, 2007 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Dec 24, 2025 | 0.00K |
| Flood | Jan 22, 2024 | 0.00K |
| Flood | Feb 4, 2024 | 0.00K |
| Flood | Mar 29, 2023 | 0.00K |
| Flood | Dec 18, 2023 | 0.00K |
| Flood | Mar 14, 2023 | 0.00K |
| Flood | Jan 9, 2023 | 0.00K |
| Flood | Dec 31, 2022 | 0.00K |
| Flood | Dec 10, 2022 | 0.00K |
| Flood | Apr 14, 2006 | 250K |
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 — Jan 22, 2024
Two storms brought heavy mountain snow with mountain travel delays and chain restrictions, widespread rain with flooding impacts, and thunderstorms to the area around the third week of January.
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 29, 2023
A strong winter storm brought moderate to heavy rain with with flooding of roadways, streams and creeks, with mudslides also reported. There was continued river flooding along the already elevated Sacramento, San Joaquin, Cosumnes, Mokelumne, and Tuolumne rivers. The storm brought dangerous mountain travel conditions with snow levels around down to 2000 feet, locally 1000 feet in Shasta County...
Flood — Dec 18, 2023
A wet system brought periods of moderate to heavy rain with scattered thunderstorms. Lines of stronger thunderstorms brought local road flooding to portions of interior Northern California. There was also a confirmed EF-1 tornado touchdown in the Oroville area, with minor damage. Snow levels were high, with impacts limited to minor travel delays for Sierra pass levels.
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 Stanislaus 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 Stanislaus County, California 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.