Enter any address in Orange County, California to see its FEMA flood zone
Flash flooding from heavy rainfall events is a significant flood character in Orange County. Between 1993 and 2023, NOAA Storm Events data recorded 58 flash flood events and 78 general flood events. For example, a cold Pacific storm combined with an atmospheric river in February 2025 brought heavy rain to the region, with 3-day precipitation amounts as high as 4 to 7 inches in the San Bernardino Mountains and one-hour rainfall rates of 0.5 to 0.9 inches per hour in mountainous areas, leading to significant debris flows and flash flooding.
National Flood Insurance Program (NFIP) claims data from Orange County shows that properties in Zone A experienced 1,565 claims over the last 30 years, with an average payout of $4,757 and an average water depth of 0.9 feet. Properties in Zone X, which includes both X_UNSHADED and X_SHADED, had a combined 836 claims, with Zone X specifically showing the highest average payout of $8,638 and an average water depth of 1.7 feet. Homeowners in Zone A, Zone X, and those in areas with unknown flood zone designations should pay particular attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
86 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Orange County, California has recorded 152 flood-related events since 1996 according to NOAA's Storm Events Database, including 58 flash floods and 78 river or area floods. The county has received 41 federal disaster declarations, 12 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1969–2023)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storms, Flooding, Landslides, And Mudslides | Flood | Mar 9, 2023 |
| Severe Winter Storms, Flooding, And Mudslides | Flood | Jan 8, 2023 |
| Coastal Fire | Fire | May 11, 2022 |
| Bond Fire | Fire | Dec 3, 2020 |
| Blue Ridge Fire | Fire | Oct 26, 2020 |
| Silverado Fire | Fire | Oct 26, 2020 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Canyon 2 Fire | Fire | Oct 9, 2017 |
| Wildfires | Fire | Oct 8, 2017 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Nov 21, 2025 | 0.00K |
| Flash Flood | Nov 20, 2025 | 0.00K |
| Flood | Nov 20, 2025 | 0.00K |
| Flood | Nov 15, 2025 | 0.00K |
| Flood | Feb 13, 2025 | 0.00K |
| Flood | Mar 11, 2025 | 0.00K |
| Flood | Mar 30, 2024 | 0.00K |
| Flood | Jan 22, 2024 | 0.00K |
| Flood | Mar 15, 2024 | 0.00K |
| Flood | Feb 6, 2024 | 0.00K |
Flood — Nov 21, 2025
Another strong area of low pressure impacts southern California and produced areas of heavy rain and strong winds.
Flash Flood — Nov 20, 2025
Another strong area of low pressure impacts southern California and produced areas of heavy rain and strong winds.
Flood — Nov 20, 2025
Another strong area of low pressure impacts southern California and produced areas of heavy rain and strong winds.
Flood — Nov 15, 2025
A strong area of low pressure impacts southern California with heavy rain, debris flow, flooding, and gusty winds across the higher terrain.
Flood — Feb 13, 2025
A cold Pacific storm combined with an atmospheric river brought heavy rain and snow to southern California. 3 day precipitation amounts as high as 4 to 7 inches occurred in the San Bernardino Mountains. 1 hour rainfall mountains of 0.5 to 0.9 inches per hour were observed in the Santa Ana and San Bernardino/San Gabriel mountains. Total rainfall of 6 inches and a maximum one hour rate of 0.65 in...
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 Orange 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 Orange 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.