California High Hazard Zones (Tier 2)

On October 30, 2015 Governor Brown issued an emergency declaration requiring public agencies to identify areas of tree mortality that hold the greatest potential to result in wildfire and/or falling trees and threaten people and property in these areas. Once identified, these areas will be prioritized for removal of dead and dying trees that present a threat to public safety.

Tier Two high hazard zones are defined by watersheds (HUC 12, average 24,000 acres) that have significant tree mortality as well as significant community and natural resource assets. Work at the Tier Two level addresses the immediate threat of falling trees and fire risk, and also supports broader forest health and landscape level fire planning issues.
This service represents the latest official release of HHZ. It will be updated annually when a new version is released. As of June 2019, it represents HighHazardZones19_1.

Data and Resources

Field Value
accessLevel public
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier c8ef5481-8115-4bb1-afe0-59f3bc23c6a5
issued 2017-06-12T23:18:45.000Z
modified 2022-06-02T16:50:06.000Z
publisher CAL FIRE
resource-type Dataset
source_datajson_identifier true
source_hash b79e4afcb17528ea19cb3336947c450a5e4bd19b
source_schema_version 1.1
theme {"Natural Resources"}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • cal-fire
  • california-department-of-forestry-and-fire-protection
  • caopendata
  • ckan
  • drought
  • fire-and-fuels
  • frap
  • geo
  • geoss
  • hazard
  • high-hazard-zones
  • national
  • north-america
  • tmtf
  • tree-mortality
  • united-states
  • watershed
isopen False
license_id notspecified
license_title License not specified
maintainer egis.CALFIRE
maintainer_email tiffany.meyer@fire.ca.gov
metadata_created 2025-11-19T14:35:34.992494
metadata_modified 2025-11-19T14:35:34.992500
notes On October 30, 2015 Governor Brown issued an emergency declaration requiring public agencies to identify areas of tree mortality that hold the greatest potential to result in wildfire and/or falling trees and threaten people and property in these areas. Once identified, these areas will be prioritized for removal of dead and dying trees that present a threat to public safety. <br /><div><br /><div>Tier Two high hazard zones are defined by watersheds (HUC 12, average 24,000 acres) that have significant tree mortality as well as significant community and natural resource assets. Work at the Tier Two level addresses the immediate threat of falling trees and fire risk, and also supports broader forest health and landscape level fire planning issues.</div><div><br /></div>This service represents the latest official release of HHZ. It will be updated annually when a new version is released. As of June 2019, it represents HighHazardZones19_1.<br /></div>
num_resources 6
num_tags 19
title California High Hazard Zones (Tier 2)