ZIP code 94558

Napa County, including Napa, Moskowite Corner, Silverado Resort and others

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Report created October 27, 2026 at www.firezones.info/zip/94558

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    56% Very High

    Most of the Very High land is in the State Responsibility Area, where the State Fire Marshal's zones apply.

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  • Fire history

    Share of the land inside a recorded wildfire perimeter

    71% has burned

    Most recently the 2025 Berry Fire, which burned 66 acres here, one of 100 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    7% Extreme

    Utilities may shut off power in the CPUC High Fire-Threat District in fire weather, and homes outside it can lose power when their lines run through it.

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Land by hazard class

  1. Very High 155,453 acres · 154,677 state, 776 local 56%
  2. High 33,434 acres · 29,789 state, 3,645 local 12%
  3. Moderate 10,938 acres · 5,250 state, 5,689 local 4%
  4. Non-wildland 24,233 acres · Local Responsibility Area 9%
  5. Not mapped by CAL FIRE 52,719 acres · Mostly federal land 19%

276,777 acres of land in all, 189,716 in the State Responsibility Area and 34,343 in the Local. State zones are the ones the State Fire Marshal designated, in effect since 1 April 2024. Local zones are CAL FIRE's 2025 recommendation, which each city or county adopts by ordinance and can make stricter. How to read fire zones

Largest fires

  1. 2020 Hennessey Fire Of 305,352 acres in all · Cause: Lightning 113,291 acres
  2. 2017 Atlas Fire Of 51,625 acres in all 41,760 acres
  3. 2018 County Fire Of 89,831 acres in all 32,686 acres
  4. 2004 Rumsey Fire Of 38,763 acres in all · Cause: Arson 32,663 acres
  5. 1981 Atlas Peak Fire Of 33,606 acres in all · Cause: Arson 31,852 acres
  6. 1999 Sixteen Fire Of 37,893 acres in all · Cause: Arson 26,092 acres
  7. 2017 Nuns Fire Of 55,798 acres in all 13,710 acres
  8. 1988 Miller Fire Of 34,565 acres in all · Cause: Arson 11,600 acres
  9. 1964 Roadside #42 Fire Of 8,957 acres in all 5,333 acres
  10. 1973 Signal Hill Fire 4,386 acres

And 90 smaller fires. In all, 197,438 acres of ZIP code 94558 have burned. Acres are the land each fire burned here, and fires that crossed less than an acre are not counted. Some older or smaller fires may be missing, and a fire perimeter can include unburned patches. How to read fire history

Sources

Fire hazard severity zones
CAL FIRE Office of the State Fire Marshal
State map published 27 June 2025, local map 2 February 2026
Fire history
CAL FIRE Fire and Resource Assessment Program
Published 28 July 2026
Power line fire risk
California Public Utilities Commission
Published 23 February 2026

This site is independent and not affiliated with CAL FIRE or the CPUC, so for an official determination, check with the agency or your city or county. How we read the data

Nearby areas

Communities in ZIP code 94558

Neighboring ZIP codes

  1. 94558 56% Very High · this area
  2. 94503 17% High
  3. 94534 10% Very High
  4. 94559 34% High · 1% Very High
  5. 94562 21% High
  6. 94567 70% Very High
  7. 94573 14% Very High
  8. 94574 58% Very High
  9. 94599 18% Very High
  10. 95442 58% Very High
  11. 95452 71% Very High
  12. 95457 67% Very High
  13. 95461 89% Very High
  14. 95476 25% Very High
  15. 95606 67% Very High
  16. 95607 71% Very High
  17. 95637 48% Very High
  18. 95688 41% Very High
  19. 95694 28% Very High