CalFire Fire Hazard Severity Zone (FHSZ) Screener — CA Parcels

California Fire Hazard Severity Zone lookup: batch point-in-polygon screening against the CAL FIRE Fire Hazard Severity Zone (FHSZ) map service, with an editorial flag for whether California's Natural Hazard Disclosure statute (Civil Code Section 1103.7 / Government Code Section 51178) requires the seller/agent to disclose the zone on a real-estate transaction.

Answers, per property: is my house in a fire hazard severity zone, which class (Moderate / High / Very High), which jurisdiction (SRA / LRA / Federal), and is disclosure legally required.

Who it's for

• CA real-estate agents & brokers — every California residential transfer requires a Natural Hazard Disclosure statement; this actor answers the "State Fire Responsibility Area" and "Very High Fire Hazard Severity Zone" checkboxes programmatically, for one parcel or a whole portfolio of listings.
• NHD report firms & title companies — cross-check or pre-screen parcels before ordering a full natural-hazard disclosure report.
• Insurance underwriters — screen a book of California policies for FHSZ exposure ahead of renewal/pricing decisions.
• Home inspectors & appraisers — flag wildfire-hazard zoning as part of a due-diligence checklist.
• Land developers & lenders — batch-screen a pipeline of California sites before acquisition or construction lending.

What it does

1. Resolves the CAL FIRE FHSZ MapServer's 4 layers (SRA, LRA-Very-High, pending/not-yet- adopted, and Federal Responsibility Area) at runtime by fetching the service's layer list and matching by name — so a CAL FIRE-side layer reorder doesn't silently break the actor (falls back to documented indices 0-3 if name-matching fails).
2. Runs an authoritative point-in-polygon query per layer for each input coordinate.
3. If the exact coordinate is clear on every layer, optionally checks a configurable radius (default 0.5 mi) for a nearby zone — useful near a parcel boundary.
4. Classifies the result: in_fhsz, hazard_class (Moderate/High/Very High), responsibility_area (SRA/LRA/Federal), zone_status (adopted/pending), and the headline field — disclosure_required — true for any adopted SRA hit (any class) or an adopted LRA Very High hit.

Example input

{
  "assets": [
    { "lat": 34.083, "lon": -118.78, "label": "Malibu hills property" },
    { "lat": 38.582, "lon": -121.494, "label": "Downtown Sacramento control" }
  ],
  "checkNearby": true,
  "nearbyRadiusMiles": 0.5
}

Output fields (one row per asset)

Field	Description
asset_label, asset_lat, asset_lon	Echo of the input site
in_fhsz	TRUE if the coordinate falls inside any mapped FHSZ layer
hazard_class	Moderate / High / Very High / null
responsibility_area	SRA / LRA / Federal / null
zone_status	adopted / pending / null
disclosure_required	TRUE = Civ. Code Section 1103.7 / Gov. Code Section 51178 disclosure trigger
layers_matched	Every FHSZ layer whose polygon hits this coordinate
nearby_zone_within_radius, nearby_hazard_class, nearby_distance_miles	Near-boundary flag when the exact point is clear
layer_source	MapServer query URL used for the primary hit
clear_flag	TRUE when fully outside every FHSZ layer (or outside CA coverage)
note	Plain-English summary, cites the statute when disclosure applies
error	Per-asset error (invalid coordinate or query failure); null when OK
disclaimer, source_url, checked_at	Standard screening metadata

A coordinate outside California returns a valid clear row (not an error) noting it is outside CAL FIRE FHSZ coverage.

Use as an MCP tool

This actor is Pay-Per-Event (Result-only) and discoverable via mcp.apify.com — an AI agent (Claude, Cursor, etc.) can call it directly as a chainable tool: pass an array of {lat, lon, label} assets and get back a structured disclosure determination per site, ready to feed into a due-diligence or listing-preparation workflow.

FAQ

Is my house in a fire hazard severity zone? Pass its coordinates as an asset; in_fhsz and hazard_class answer directly.

FHSZ map lookup California — is there an API? Yes — this actor wraps CAL FIRE's own ArcGIS FHSZ service in a batch-friendly, disclosure-aware API.

Natural hazard disclosure fire zone — do I have to disclose this on a home sale? disclosure_required answers this per Civ. Code Section 1103.7 / Gov. Code Section 51178 for adopted SRA (any class) and adopted LRA Very High zones. Always confirm with a licensed NHD provider before closing.

What's the difference between SRA and LRA? SRA = State Responsibility Area (CAL FIRE jurisdiction, any hazard class triggers disclosure); LRA = Local Responsibility Area (only the Very High class is mapped/disclosure-triggering); Federal = federal land, informational only, not a state disclosure trigger.

Source & disclaimer

Data: CAL FIRE / CA Government Operations Agency Fire Hazard Severity Zone MapServer (services.gis.ca.gov). This is an informational screening tool, not a substitute for an official CAL FIRE FHSZ viewer lookup or a licensed Natural Hazard Disclosure report. Zone boundaries are periodically revised — confirm current adopted status before any real-estate, insurance, or construction decision.

Pricing: $8 per 1,000 result rows (Pay-Per-Event, Result-event only). Categories: Real estate, Developer tools, Agents.