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State rollup

California disaster history

County pages for California, ordered by declaration count and backed by the FEMA datasets described in the brief.

Declarations
1,650
County declaration rows
Counties affected
58
State pages with county rollups
Tracked FEMA aid
$19.4B
PA + assistance signals
Top incident
Fire
Sep 3, 2025
County directory

Counties with the most declarations

These are the county pages most likely to match long-tail “county + disaster history” searches.

Los Angeles County88 declarationsRiverside County65 declarationsSan Bernardino County61 declarationsVentura County52 declarationsSan Diego County51 declarationsSanta Barbara County43 declarationsOrange County41 declarationsShasta County41 declarationsKern County40 declarationsButte County39 declarationsNapa County39 declarationsSonoma County36 declarationsLake County35 declarationsSanta Cruz County34 declarationsMendocino County33 declarationsMonterey County33 declarationsTrinity County32 declarationsSolano County30 declarationsSan Luis Obispo County28 declarationsYuba County28 declarationsEl Dorado County27 declarationsHumboldt County27 declarationsMarin County26 declarationsPlacer County26 declarationsMadera County25 declarationsSan Joaquin County25 declarationsSanta Clara County25 declarationsTehama County25 declarationsAlameda County24 declarationsMariposa County24 declarationsSan Mateo County24 declarationsCalaveras County23 declarationsNevada County23 declarationsPlumas County23 declarationsSacramento County23 declarationsSiskiyou County23 declarationsTulare County23 declarationsYolo County22 declarationsAmador County21 declarationsContra Costa County21 declarationsDel Norte County21 declarationsGlenn County21 declarationsTuolumne County21 declarationsFresno County20 declarationsStanislaus County20 declarationsSutter County20 declarationsColusa County19 declarationsKings County19 declarationsLassen County19 declarationsMerced County19 declarationsSan Benito County18 declarationsModoc County17 declarationsInyo County16 declarationsSierra County16 declarationsAlpine County15 declarationsImperial County15 declarationsMono County14 declarationsSan Francisco County11 declarations
Recent declarations

Latest county-level events

FireNov 2024Ventura County

MOUNTAIN FIRE

FM-5545-CA · Nov 6, 2024 to Nov 15, 2024
$0PA obligated
0Registrations
$0Household aid
PA, HMPrograms
FireSep 2024Lake County

BOYLES FIRE

FM-5536-CA · Sep 8, 2024 to Sep 11, 2024
$0PA obligated
0Registrations
$0Household aid
PA, HMPrograms
FireJul 2024Kern County

BOREL FIRE

FM-5522-CA · Jul 25, 2024 to Aug 10, 2024
$0PA obligated
0Registrations
$0Household aid
PA, HMPrograms
FireJul 2024Butte County

PARK FIRE

FM-5519-CA · Jul 24, 2024 to Aug 20, 2024
$0PA obligated
0Registrations
$0Household aid
PA, HMPrograms
FireJul 2024Tehama County

PARK FIRE

FM-5519-CA · Jul 24, 2024 to Aug 20, 2024
$0PA obligated
0Registrations
$0Household aid
PA, HMPrograms
FireJul 2024Mariposa County

FRENCH FIRE

FM-5503-CA · Jul 4, 2024 to Jul 7, 2024
$0PA obligated
0Registrations
$0Household aid
PA, HMPrograms
FireJul 2024Butte County

THOMPSON FIRE

FM-5502-CA · Jul 2, 2024 to Jul 6, 2024
$0PA obligated
0Registrations
$0Household aid
PA, HMPrograms
About this state

FEMA disaster context for California

California has 1,650 county-level FEMA disaster declarations spread across 58 counties. The most common declaration type is fire. Across all counties, FEMA datasets track $19.4B in combined public and individual assistance obligations.

The counties with the heaviest disaster history are Los Angeles County (88 declarations), Riverside County (65), and San Bernardino County (61). Each county page breaks down the timeline, hazard mix, spending categories, and flood insurance signals for that specific area.

Declaration counts reflect how often FEMA formally declared a disaster or emergency affecting a county — not the total number of natural events. A single hurricane can generate declarations across dozens of counties and multiple states. The county pages linked above show the per-county detail behind these state-level totals.