What is the flood risk in 94102 San Francisco?

The flood hazard score for 94102 is 4.1/10 (MODERATE). This score is derived from FEMA flood zones, elevation data, and NFIP claim density.

Is 94102 in a hurricane zone?

San Francisco (94102) is not typically in a direct hurricane path, though tropical storm remnants can affect the area.

What natural disasters affect San Francisco, California?

The primary natural hazards for San Francisco (94102) are earthquake, wildfire, flood. Calchis provides hazard scores for each peril using data from USGS, NOAA, and FEMA.

San Francisco, California 94102

San Francisco County · California

37.7749° N, 122.4194° W

Calchis Hazard Scores

⊕Earthquake

9.4/10EXTREME

Seismic source zone activity (Gutenberg-Richter, Pacific Coast zone aggregate M5+ rate)3.5 / 3.5

Proximity to mapped Quaternary faults2.6 / 3.0

Historical damage potential (Hazus W1 thresholds)2.9 / 3.5

Model v2.5 · Hazard score

△Wildfire

6.9/10HIGH

Large fire frequency (California region, 10,000+ acres)3.5 / 3.5

Wildland-Urban Interface exposure, measured development/wildland mixture (0.383)1.3 / 3.5

Regional vegetation/fuel load proxy (unsourced constant)2.5 / 3.0

Model v2.5 · Hazard score

≋Flood

4.1/10MODERATE

FEMA flood zone (X)0.3 / 4.0

Elevation above base flood level (estimated)1.0 / 3.0

Federal disaster declarations (41 in CA since 1953 · ~1 per 1.8yr)2.8 / 3.0

Model v2.5 · Hazard score

●Winter Storm

1.0/10LOW

Winter events per forecast zone per year (1.0542)0.9 / 5.0

Ice storm and blizzard share of winter events (0.7%)0.1 / 5.0

Model v2.5 · Hazard score

◠Tornado

0.4/10LOW

Tornado events per 10,000 km2 per year, observed within ~83km (0.24)0.2 / 5.0

Manufactured housing density proxy0.5 / 3.0

Nocturnal tornado fraction (fatality multiplier)0.3 / 2.0

Model v2.5 · Hazard score

Not scored here: Hurricane, Hail — each holds under 0.5% of the national record for that peril and is not on the kept list.

Natural Hazards in San Francisco

Based on historical data and geographic analysis, the primary natural hazards affecting San Francisco, California (94102) are earthquake, wildfire and flood. These scores are derived from federal and academic sources.

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ZIP-level scores provide a general overview. For address-specific hazard analysis with consequence ring exposure, active event monitoring, and full score component breakdown — use the Calchis workbench.

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California Hazard Profiles

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