Rosemead, CA (ZIP 91770) has experienced 86 recorded natural disaster events based on federal and state agency records. These include 61 earthquakes, 20 wildfires, and 3 tornadoes. A total of 1 injury has been reported across all events.
With 61 recorded incidents (71% of all events), earthquakes are the leading natural hazard for this ZIP code. Of these, 3 (5%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for seismic events here is 4/5 (severe). The most recent recorded earthquake occurred on Aug 12, 2024.
There have been 20 recorded wildfires in this area, representing 23% of all disaster events. The most recent recorded wildfire occurred on Jan 2, 2019.
Rosemead has experienced 3 tornadoes on record. The most recent recorded tornado occurred on Mar 22, 2023.
Rosemead has experienced 2 hailstorms on record. The most recent recorded hailstorm occurred on Mar 15, 2024.
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Based on federal and state records, ZIP code 91770 has experienced 86 natural disaster events. The hazard types affecting this area include earthquakes (61 events), wildfires (20 events), tornadoes (3 events), and hailstorms (2 events). The primary hazard is earthquakes, which account for 71% of all recorded events.
Earthquakes are the most frequently recorded hazard in Rosemead, CA, with 61 events documented.
Rosemead has 3 recorded tornado events in the historical record. The most recent tornado was recorded on Mar 22, 2023.
The most damaging natural disaster on record for ZIP code 91770 was M4.4 Earthquake, which occurred on Aug 12, 2024. It was rated at severity level 3/5.
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 →