Ontario, CA (ZIP 91764) has experienced 149 recorded natural disaster events based on federal and state agency records. These include 110 earthquakes, 30 wildfires, and 9 floods. Total documented property damage amounts to $198.5K. Across all recorded events, 3 deaths have been attributed to natural disasters in this area.
The dominant hazard type for Ontario is earthquakes, with 110 recorded events making up 74% of the area's disaster history. 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 Aug 6, 2025.
There have been 30 recorded wildfires in this area, representing 20% of all disaster events. The most recent recorded wildfire occurred on Nov 2, 2019.
Ontario has experienced 9 floods on record. Of these, 4 (44%) 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 5/5 (extreme). Flood-related events have caused a combined $198.5K in documented property damage. 3 fatalities have been attributed to floods in this area. The most recent recorded flood occurred on Nov 8, 2022.
The most significant disaster event on record for Ontario was Flash Flood on Jan 8, 2005, which caused $100K in property damage.
Explore disaster history for adjacent areas
Based on federal and state records, ZIP code 91764 has experienced 149 natural disaster events. The hazard types affecting this area include earthquakes (110 events), wildfires (30 events), and floods (9 events). The primary hazard is earthquakes, which account for 74% of all recorded events.
Earthquakes are the most frequently recorded hazard in Ontario, CA, with 110 events documented.
Yes, Ontario (ZIP 91764) has 9 recorded flood events. These floods have caused $198.5K in total property damage. The most recent flood on record occurred on Nov 8, 2022.
The most damaging natural disaster on record for ZIP code 91764 was Flash Flood, which occurred on Jan 8, 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 $198.5K in property damage in the Ontario, CA area (ZIP 91764). 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 →