Across the places we scored in San Francisco County, overall wildfire risk runs from 5.0 to 60.4, with a middle value of 13.4. The lowest scored places are in unincorporated San Francisco County, and the highest scored place is in San Francisco.
We scored 116 points across San Francisco County on the same 0–100 scale a Satelife address report uses, and they do not land in one place. 2% of them come out High, while 74% are Low. Which end your own parcel sits at is not something a county map can tell you.
FEMA NRI also rates San Francisco County: all-hazards risk Very High · social vulnerability Relatively Moderate · community resilience Very High · annualised wildfire frequency 0.0000.
Sources: FEMA National Risk Index 1.20.0 (Dec 2025), county record · USFS Wildfire Risk to Communities v2.0, mean of the grid cells inside the county. Both describe the county as a whole, never an address in it.
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Most scored points fall in the Low tier (86 points), followed by Moderate (28 points). Only 2 points are in High, and none are in Very High.
For county-wide context, FEMA’s National Risk Index rates San Francisco County’s wildfire risk as “Very Low.”
Since 1984, 2 fire perimeters are recorded in the county, with 2 acres burned in total. That equals 0.0% of county area burned since 1984.
In this record, the largest fire is listed as Elcamino (1988), and the most recent large fire is Lincoln (1996). Both are listed at 1 acre.
An older fire, Kirby Beach (1968), is listed at 115 acres and is marked as partly in the county.
Fire perimeters coloured by decade. Select a perimeter for its name, year and size.
Perimeter sources: NIFC Interagency Fire Perimeter History · largest on record: Elcamino 1988. Perimeters are simplified for display; acreage is the figure the source records.
The only community listed here is San Francisco, with a population of 873,965. Its middle overall wildfire risk score is 18.9.
FEMA’s National Risk Index rates San Francisco County’s wildfire expected annual loss from wildfire as “Very Low.” In the same index, the county’s all-hazards risk rating is “Very High.”
FEMA also rates the county’s social vulnerability as “Relatively Moderate” and community resilience as “Very High.”
The score is the median of the sampled points nearest that community — a community-scale indicator, not a score for any individual property in it. Population comes from the community's own record where the source carries one.
Terrain scores are low in many places, with a middle value of 5.0, but they reach 40.0 at the high end in San Francisco. The minimum terrain score is 5.0 in unincorporated San Francisco County.
Vegetation and fuels also have a low middle value of 5.0, with a higher end of 56.9 in San Francisco. The minimum is 5.0 in unincorporated San Francisco County.
These two factors contribute to local differences in wildfire risk from one part of the county to another.
Fire weather could not be measured across the county. It was measured at only 4 of the 116 scored points, near San Francisco, where the score is 67.5.
Because that measurement is limited to a handful of points, countywide patterns here rely more on the factors that were scored broadly, including terrain, vegetation and fuels, hazard zones, and fire history.
Fire weather was measured at 4 of the 116 sampled points (near San Francisco, 67.5) — too few to publish as a county range, so no high/low is shown here.
Wildfire risk is not uniform inside the county. The highest overall scored place is San Francisco at 60.4, while the minimum is 5.0 in unincorporated San Francisco County.
The city of San Francisco has a middle overall score of 18.9, compared with the countywide middle value of 13.4 across scored places.
Hazard-zone scores span from 10.0 to 82.6, and both the minimum and maximum occur in unincorporated San Francisco County. That means those unincorporated areas include both lower and higher hazard-zone locations.
Each bar is what one part of the score covers across San Francisco County, on the same 0–100 scale. A long bar is a part of the risk that depends on where you are; a short one is the same almost everywhere.
The tick on each bar is the middle value. Tier boundaries — Moderate at 25, High at 50, Very High at 75 — are the faint lines behind them.
| Layer | Min | Median | Max | Lowest place | Highest place | Points |
|---|---|---|---|---|---|---|
| Terrain | 5 | 5 | 40 | unincorporated San Francisco County | San Francisco | 116 |
| Vegetation & fuels | 5 | 5 | 56.9 | unincorporated San Francisco County | San Francisco | 116 |
| Hazard zone | 10 | 10 | 82.6 | unincorporated San Francisco County | unincorporated San Francisco County | 116 |
| Fire history | 5 | 5 | 95 | unincorporated San Francisco County | San Francisco | 116 |
| Fire weather* | — | — | 67.5 | — | near San Francisco | 4 |
| Composite | 5 | 13.4 | 60.4 | unincorporated San Francisco County | San Francisco | 116 |
*Fire weather returned a reading at only 4 of the 116 sampled points. The one value measured is shown under Max with the place beside it; there is no county range to report, so the other columns are left blank.
Independently of Satelife's layers, the USFS Wildfire Risk to Communities grid puts the county's mean annual burn probability at 8.70% (90th percentile cell: 0.97%), with a mean conditional flame length of 4.91 ft. 26% of the 9,501 grid cells inside the county carry burnable fuel at all.
Source: USFS Wildfire Risk to Communities v2.0 (ImageServer, county extent).
CAL FIRE has no mapped Fire Hazard Severity Zone at 64 of the 116 sampled points — the zones cover Local Responsibility Areas, and most of this county is state or federal land. At 16 of them the USFS grid above supplied the hazard reading instead; at the remaining 48 the hazard weight is renormalised away rather than scored as low.
116 sample points on a ~2.3 km grid, plus one at the centre of each community, weighted with the Satelife county profile v1 · median layer coverage 90%. Scores are 0–100 and comparable within the county, not across states.
Two mapped factors show high local peaks in the county: fire-history scores reach 95.0 in San Francisco, and hazard-zone scores reach 82.6 in unincorporated San Francisco County. At the low end, fire history is 5.0 and hazard zone is 10.0.
A separate U.S. Forest Service product estimates mean annual burn probability at 8.70% for the county, and it indicates 26.3% of the county can burn. It also reports mean conditional flame length of 4.91 feet.
For an individual home, that means nearby conditions can differ a lot even within the same county, so the address-level maps and tables matter.
Find out where your San Francisco County parcel sits
Slope, the fuel touching the structure, the road out, the fire history within a mile — measured at your address, not averaged across the county.
Free to request · PDF report with a 0–100 score, the drivers behind it, and a mitigation plan
Every one of the 35 ZIP areas that touch San Francisco County — we run address-level reports in all of them. They are grouped by the median score of the points we sampled inside each, which is a neighbourhood-scale indicator and not a score for any property: two homes in the same ZIP routinely land in different tiers.
High 1 ZIP
Moderate 7 ZIPs
Low 7 ZIPs
No sampled point inside 20 ZIPs
94005 San Francisco · 94014 San Francisco · 94104 San Francisco · 94105 San Francisco · 94108 San Francisco · 94109 San Francisco · 94110 San Francisco · 94111 San Francisco · 94115 San Francisco · 94116 San Francisco · 94117 San Francisco · 94130 San Francisco · 94133 San Francisco · 94158 San Francisco · 94188 San Francisco · 94501 San Francisco · 94607 San Francisco · 94801 San Francisco · 94920 San Francisco · 94965 San Francisco
Grouped from 15 of 35 ZIP areas — the rest had no sample point fall inside them. The community shown is the nearest mapped place to the ZIP's centre.
ZIP areas are Census 2020 ZIP Code Tabulation Areas intersecting the county boundary.
No. The record here shows 2 acres burned since 1984, across 2 fire perimeters, which is 0.0% of the county area.
The highest scored place is San Francisco at 60.4. The lowest score is 5.0 in unincorporated San Francisco County.
No. Fire weather was measured at only a handful of points, not across the county: 4 of 116 points, near San Francisco, with a score of 67.5 at that measured location.
FEMA’s National Risk Index rates San Francisco County’s wildfire risk as “Very Low” and its wildfire expected annual loss as “Very Low.” These are county-level ratings.
It reports a mean annual burn probability of 8.70% for the county, and says 26.3% of the county can burn.
A county range shows the spread. An address-level Satelife report shows where in that spread your property actually sits — PDF, per-layer score, and a prioritized mitigation plan.
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