Porter Ranch, CA (ZIP 91326) sits in one of the more disaster-active areas in the region, with 470 natural disaster events on record. These include 359 earthquakes, 110 wildfires, and 1 hailstorm.
With 359 recorded incidents (76% of all events), earthquakes are the leading natural hazard for this ZIP code. Of these, 5 (1%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for seismic events here is 5/5 (extreme). The most recent recorded earthquake occurred on May 3, 2020.
Wildfires account for 23% of the disaster record here, with 110 events documented. Of these, 3 (3%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for wildfire-related events here is 4/5 (severe). The most recent recorded wildfire occurred on Jan 9, 2025.
Porter Ranch has experienced 1 hailstorm on record. The most recent recorded hailstorm occurred on Mar 7, 2024.
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Based on federal and state records, ZIP code 91326 has experienced 470 natural disaster events. The hazard types affecting this area include earthquakes (359 events), wildfires (110 events), and hailstorm (1 event). The primary hazard is earthquakes, which account for 76% of all recorded events.
Earthquakes are the most frequently recorded hazard in Porter Ranch, CA, with 359 events documented.
The most damaging natural disaster on record for ZIP code 91326 was Wildfire: HURST (831 acres), which occurred on Jan 9, 2025. It was rated at severity level 2/5.
Data sourced from FEMA (disaster declarations, NFIP flood claims), NOAA Storm Events Database, USGS Earthquake Hazards Program, and NIFC wildfire records. Historical coverage varies by source, with most records beginning in the 1950s–1970s. Full methodology →