Fresno County, California

What hazards hit Fresno County most?

The most frequent records are fog, smoke and funnel cloud records: 1,104 since 1996. 66% of its fog, smoke and funnel cloud records since 1996 fell in December and January. The rank column places the county among California's counties by days with a record per 1,000 square miles of land over each hazard's complete period.

Source: NOAA NCEI Storm Events Database (county and forecast-zone records attributed to the county; a zone record shows its own totals on each county it covers). Days: dates with at least one record of the hazard in the county. Ranks: days with a record per 1,000 square miles of land (Census Bureau 2024 Gazetteer), since 1950 for tornadoes, 1955 for hail and thunderstorm wind, 1996 for the rest.

How many tornadoes has Fresno County had?

NOAA records 31 tornadoes in Fresno County from 1957 to 2020, the strongest rated F2, with 0 deaths and 3 injuries recorded in the county. That is 19th of 57 California counties by days with tornadoes per 1,000 square miles since 1950. A tornado that crossed a county line is counted in each county it touched, with the length of its path inside the county.

Counted as whole tornadoes rather than county records, the Storm Prediction Center's database holds 32 tornadoes whose track touched Fresno County since 1950 (NOAA's county records number 31: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 0 people.

Map of the strongest tornado tracks in California.

Source: NOAA NCEI Storm Events Database, tornado records by county (path length in the county, maximum width); ratings as published: F scale before February 1, 2007, EF scale after. Whole-track figures: NOAA Storm Prediction Center tornado database (1950-2025). SPC severe weather database.

When was the last damaging storm in Fresno County?

The most recent record with damage, injuries or deaths is the February 2, 2026 dense fog (1 injury).

CHP reported a two vehicle traffic collision at intersection on Ave 14 at Rd. 24 with heavy fog in area. One minor injury reported.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 1312632)

Source: NOAA NCEI Storm Events Database; every record of 2025-2026 is listed, earlier ones when they caused deaths, injuries or $250,000 of damage (2025 dollars), and every tornado.

The deadliest and costliest records

Source: NOAA NCEI Storm Events Database: deaths and injuries direct and indirect; damage is property plus crops as estimated by the National Weather Service, converted to 2025 dollars.

Is it getting more frequent?

Records per decade for Fresno County's most frequent hazards. Counts rose everywhere after 1996, when NOAA began recording every event type, so compare decades within a hazard's complete period only (the shaded cells come before it).

Drought in the 2010s: 148 records against 14 in the decade before, 148 of them forecast-zone records. Heat in the 2020-26: 314 records against 51 in the decade before, 314 of them forecast-zone records. Cells marked z rose mostly through zone records. The local National Weather Service office files these once per forecast zone, so a change in how it draws its zones or splits a storm into records moves this count as much as the weather does; read it beside the Fresno County days with a record above.

Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).

What time of year?

66% of its fog, smoke and funnel cloud records since 1996 fell in December and January. The two busiest months are in violet.

Source: NOAA NCEI Storm Events Database, records by the month they began.

Federal disaster declarations for Fresno County

FEMA's register lists 20 declarations that include Fresno County: 13 major disasters, 5 emergencies and 2 fire management assistance declarations. Most were for flood (6) and severe storm (4).

Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), declarations through October 2, 2026; one declaration is counted once however many areas it names. OpenFEMA dataset page.

How many floods has Fresno County had?

NOAA's Storm Events Database holds 358 flood or flash flood records for Fresno County from 1996 to 2025, on 133 days, with 2 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Fresno County ranks 792nd of 2,942 U.S. counties.

The National Flood Insurance Program has paid $2.2 million on 278 claims filed in Fresno County; the most in one year was 68 in 1995. Claims count insured losses only: uninsured flood damage is not in this file.

Source: FEMA OpenFEMA NFIP Redacted Claims, as of September 8, 2026; claims by year of loss, payments in the dollars of the year paid. OpenFEMA dataset page.

FEMA's modeled risk for Fresno County

FEMA's National Risk Index rates Fresno County Relatively High overall, with an expected annual loss of $557 million. These are FEMA's model estimates of future loss from 18 hazards, not a count of what happened; they can differ from the record above.

Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.

Counties that share a border with Fresno County

1. Fresno County 4,725
2. Tulare County 3,121
3. Madera County 2,487
4. Merced County 1,946
5. Kings County 1,588
6. Inyo County 948
7. Mono County 915
8. Monterey County 625
9. San Benito County 147

Source: U.S. Census Bureau county adjacency file; NOAA NCEI Storm Events Database, records since 1950. The Census Bureau's adjacency file.

Next

• Tornadoes in CaliforniaEvery California tornado since 1950 and the counties with the most per square mile
• The California recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in Fresno CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download Fresno County's FEMA declarations (CSV)20 rows: every declaration that named the county, for your own analysis