Federal records document 155 natural disaster events in the Diamond Bar, CA area (ZIP 91789). These include 99 wildfires, 50 earthquakes, and 3 severe wind events. Total documented property damage amounts to $130K.
The dominant hazard type for Diamond Bar is wildfires, with 99 recorded events making up 64% of the area's disaster history. The most recent recorded wildfire occurred on Jan 2, 2019.
There have been 50 recorded earthquakes in this area, representing 32% of all disaster events. Of these, 2 (4%) 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 Dec 28, 2019.
Diamond Bar has experienced 3 severe wind events on record. The most recent recorded severe wind event occurred on Apr 18, 2000.
Diamond Bar has experienced 2 floods on record. Of these, 2 (100%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for flood-related events here is 4/5 (severe). Flood-related events have caused a combined $130K in documented property damage. The most recent recorded flood occurred on Feb 22, 2005.
Diamond Bar has experienced 1 hailstorm on record. The most recent recorded hailstorm occurred on Mar 1, 2014.
The most significant disaster event on record for Diamond Bar was Flash Flood on Feb 21, 2005, which caused $100K in property damage.
Explore disaster history for adjacent areas
Based on federal and state records, ZIP code 91789 has experienced 155 natural disaster events. The hazard types affecting this area include wildfires (99 events), earthquakes (50 events), severe wind events (3 events), floods (2 events), and hailstorm (1 event). The primary hazard is wildfires, which account for 64% of all recorded events.
Wildfires are the most frequently recorded hazard in Diamond Bar, CA, with 99 events documented.
Yes, Diamond Bar (ZIP 91789) has 2 recorded flood events. These floods have caused $130K in total property damage. The most recent flood on record occurred on Feb 22, 2005.
The most damaging natural disaster on record for ZIP code 91789 was Flash Flood, which occurred on Feb 21, 2005. This event caused $100K in documented property damage. It was rated at severity level 4/5.
Natural disasters have caused a documented total of $130K in property damage in the Diamond Bar, CA area (ZIP 91789). This figure is based on historical records from FEMA, NOAA Storm Events Database, and USGS, and covers events from the 1950s through the present. Actual damages may be higher, as not all events have complete damage assessments.
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 →