Key facts
- Alert
- Coastal Flood Warning (severe)
- Issued by
- National Weather Service, San Diego CA
- Areas
- San Diego County Coastal Areas; Orange County Coastal
- In effect
- until 1:00 PM PDT, Oct 29, 2026
What the National Weather Service says
“Significant coastal flooding expected.”
NWS San Diego CA, Coastal Flood Warning, 2:02 AM PDT Oct 27, 2026 · official alert
“Numerous roads may be closed.”
NWS San Diego CA, Coastal Flood Warning, 2:02 AM PDT Oct 27, 2026 · official alert
“If travel is required, do not drive around barricades or through water of unknown depth.”
NWS San Diego CA, Coastal Flood Warning, 2:02 AM PDT Oct 27, 2026 · official alert
What to do
Take the necessary actions to protect flood-prone property. Coastal residents and managers of infrastructure in the warned area should prepare for rising water.
Expect the highest water around the late-morning high tides each day. Plan trips with that timing in mind, since numerous roads may be closed.
If you must travel, do not drive around barricades or through water of unknown depth. The National Weather Service says just 6 inches of moving water can knock you down, and 1 foot can sweep a vehicle away.
If water is rising near you, move to higher ground.
Context
FEMA flood-insurance records show 2,447 claims in San Diego County and 3,843 in Orange County since 1978. These counts cover only insured properties, so they understate total flood losses.
Both counties have had federal disaster declarations that included flooding. One is declaration 4305 from March 16, 2017, for severe winter storms, flooding, and mudslides, which covered both counties.
Updates
- NWS San Diego CA issued the coastal flood warning until 1:00 PM PDT.
History here
This county: 2447 flood insurance claims in FEMA's National Flood Insurance Program records since 1978, most recent 2026.
This county: recent federal disaster declarations
- DR-4758 (2024): severe storm and flooding
- DR-4683 (2023): severe winter storms, flooding, landslides, and mudslides
- DR-4569 (2020): wildfires
- DR-4353 (2018): wildfires, flooding, mudflows, and debris flows
- DR-4305 (2017): severe winter storms, flooding, and mudslides
This county: 3843 flood insurance claims in FEMA's National Flood Insurance Program records since 1978, most recent 2026.
This county: recent federal disaster declarations
- DR-4344 (2017): wildfires
- DR-4305 (2017): severe winter storms, flooding, and mudslides
- DR-1952 (2011): severe winter storms, flooding, and debris and mud flows
- DR-1810 (2008): wildfires
- DR-1731 (2007): wildfires, flooding, mud flows, and debris flows
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Questions
- Is there a Coastal Flood Warning in San Diego County?
- Yes. The National Weather Service in San Diego has a Coastal Flood Warning for San Diego County coastal areas until 1:00 PM PDT Thursday.
- Is there a Coastal Flood Warning in Orange County, California?
- Yes. Orange County coastal areas are under the same warning, which remains in effect until 1:00 PM PDT Thursday.
- What impacts are expected from this coastal flooding?
- The National Weather Service says numerous roads may be closed. Low-lying homes, businesses, and some critical infrastructure will be inundated, and some shoreline erosion will occur in the late mornings.
Sources
- NWS San Diego CA: Coastal Flood Warning, Oct 27, 2026 weather.gov
- FEMA OpenFEMA: NFIP claims and disaster declarations fema.gov
How this page is made. The Herebeat Hazard Desk builds event pages from official U.S. government data (National Weather Service, USGS, FEMA). The text is written with AI from that data; every number and quote is checked against the official source automatically before publishing, and the page is updated when the agency updates the event. The official source is always the reference. Spotted a mistake? info@herebeat.app. About the Hazard Desk.