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HearthDry
Flood · 2023

California Atmospheric River Series 2023

December 2022 – March 2023 (9 consecutive Atmospheric Rivers) · CA

$4.6 billion (state estimate)

Total Damage

50,000+

Homes Flooded

$1.8 billion

Insured Losses

$300 million

FEMA Grants

What Happened

Nine consecutive Atmospheric River events struck California from December 2022 through March 2023, ending California's multi-year drought in catastrophic fashion. Hardened drought soils could not absorb water — runoff rates exceeded storm drain capacity across major urban areas. The Sacramento region came within weeks of levee failures. Montecito was hit by debris flows. San Francisco received 200% of normal annual rainfall in 90 days.

Rainfall Record

40–70 inches in parts of Sierra Nevada; 10–20 inches across urban California in record time

Affected Cities & States

States

CA

Primary Cities

  • Los Angeles
  • San Francisco
  • Sacramento
  • San Jose
  • Santa Cruz

Key Lessons for Homeowners

  1. 1

    California went from historic drought to historic flood within weeks — the whiplash cycle is accelerating

  2. 2

    Private home insurers were withdrawing from California while these events were occurring — insurer availability crisis

  3. 3

    Drought-hardened soils behave like concrete during extreme rainfall — dry years followed by wet years = extreme flood risk

  4. 4

    Mountain communities faced combined flood + landslide risk when burned Atmospheric Rivers struck

Damage & Recovery by the Numbers

Total Economic Damage
$4.6 billion (state estimate)
Insured Losses
$1.8 billion
Homes Flooded
50,000+
FEMA Grants Issued
$300 million
FEMA Declaration #
DR-4699

Official Resources

FEMA Declaration Number: DR-4699

Apply for federal disaster assistance at DisasterAssistance.gov — use declaration number above to look up your eligibility.

Dealing With Water Damage Now?

24/7 emergency response across all affected states

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Related Resources

Other Major Events

California Atmospheric River Series 2023 — Frequently Asked Questions

How much damage did California Atmospheric River Series 2023 cause?
California Atmospheric River Series 2023 (2023) caused $4.6 billion (state estimate) in total damages, with $1.8 billion in insured losses. Approximately 50,000+ homes were flooded. FEMA issued $300 million in individual assistance grants to affected homeowners.
What are the key lessons from California Atmospheric River Series 2023 for homeowners?
Key lessons from California Atmospheric River Series 2023: California went from historic drought to historic flood within weeks — the whiplash cycle is accelerating; Private home insurers were withdrawing from California while these events were occurring — insurer availability crisis; Drought-hardened soils behave like concrete during extreme rainfall — dry years followed by wet years = extreme flood risk; Mountain communities faced combined flood + landslide risk when burned Atmospheric Rivers struck.
Does homeowners insurance cover damage from events like California Atmospheric River Series 2023?
Standard homeowners insurance does NOT cover flood damage from events like California Atmospheric River Series 2023. This type of damage — surface water flooding from river flooding and storm runoff — requires separate NFIP (National Flood Insurance Program) or private flood insurance. FEMA disaster assistance (average $300 million per event) provides limited supplemental help for uninsured losses, but is far below typical replacement costs.
How do I apply for FEMA assistance after a disaster like California Atmospheric River Series 2023?
Apply at DisasterAssistance.gov or call 1-800-621-3362 within 60 days of the federal disaster declaration for your county. You will need your Social Security number, property address, insurance policy information, and a description of damages. FEMA will schedule a home inspection. Processing typically takes 1-2 weeks for initial determination. If denied, you have 60 days to appeal with additional documentation.
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