ZIP code 91001, covering Altadena, CA, has 83 natural disaster events in the historical record. These include 75 wildfires, 7 earthquakes, and 1 hailstorm.
The dominant hazard type for Altadena is wildfires, with 75 recorded events making up 90% of the area's disaster history. Of these, 9 (12%) 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 5/5 (extreme). The most recent recorded wildfire occurred on Jan 31, 2025.
Altadena has experienced 7 earthquakes on record. One event reached severity level 4 or 5 on the normalized scale. The highest recorded severity for seismic events here is 4/5 (severe). The most recent recorded earthquake occurred on Jun 29, 1992.
Altadena has experienced 1 hailstorm on record. The most recent recorded hailstorm occurred on Oct 17, 2005.
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Based on federal and state records, ZIP code 91001 has experienced 83 natural disaster events. The hazard types affecting this area include wildfires (75 events), earthquakes (7 events), and hailstorm (1 event). The primary hazard is wildfires, which account for 90% of all recorded events.
Wildfires are the most frequently recorded hazard in Altadena, CA, with 75 events documented.
The most damaging natural disaster on record for ZIP code 91001 was Wildfire: EATON (14.1K acres), which occurred on Jan 31, 2025. It was rated at severity level 4/5.
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 →