Ontario Disaster Risk Score & Hazard Analysis
With a population of 178,347 and a calculated risk score of 99.8, Ontario faces unique challenges. This page is a complete hazard risk assessment for Ontario, CA. Ontario is a city with a rich history and bright future. But smart residents know to keep an eye on the forecast. We found that wildfires rank among the highest local hazards.
Total Risk Score
With a calculated Risk Score of 99.828, Ontario requires specific preparation. The data highlights Wildfire as the most critical threat to mitigate.
Wildfire risk in Ontario, California
The dry climate and vegetation surrounding Ontario create conducive conditions for wildfires, especially during drought seasons. Residents in the wildland-urban interface need to be particularly vigilant about defensible space.
Ontario Wildfire Evacuation Plan
- •Clear dry leaves and debris from gutters and roof
- •Have a 'Go Bag' packed and ready near the door
- •Sign up for local emergency alerts
Top Hazards for The Ontario Area
As population density grows in California, future climate projections suggest an uptick in wildfire severity. However, our modeling, based on FEMA and NOAA datasets, assigns a score of 99.9/100. During peak season, air quality can dissolve quickly, making N95 masks an essential kit item.
Given the environmental patterns common in California, the potential for earthquakes in Ontario stands out as a primary factor. Additionally, this score of 99.9 reflects both the frequency and potential severity of events. Emergency kits must include shoes and gloves to navigate debris after an event.
Looking at the long-term climate history of California, resilience against river flooding is a key aspect of local safety. Therefore, we calculate a specific index of 99.4, indicating a substantial threat level. Sandbagging locations and shelter routes should be identified before the season starts.
Monitor Active Threats
Ontario has identified seismic or wildfire risks. Check our real-time tracker for active events.
The Apartment Fortress
Living in Ontario? Learn how to handle water storage, sanitation, and security in a small space.
How to Prepare in Ontario
Read the Full Guide →Residents of Ontario must prioritize defensible space and air quality. Fire moves fast, and smoke can be just as dangerous. Your preparation should focus on rapid evacuation and respiratory protection.
Critical Action Checklist
- 1Keep gutters clean of dry leaves and debris.
- 2Have N95 masks in your kit for smoke protection.
- 3Pack a 'Go-Bag' with wool blankets and protective clothing.
- 4Know at least two evacuation routes out of your neighborhood.
- 5Create defensible space by clearing dry vegetation 30ft from your home.
Essential Gear for Ontario
Water
Scepter 5 Gallon Water Container
Bombproof water storage. 5 gallons is the minimum for one person for 5 days.
Power
Petzl Actik Core Headlamp
600 lumens and rechargeable. Hands-free lighting is critical during power outages.
Water
Sawyer Products Mini Water Filtration System
Filters up to 100,000 gallons. Essential when tap water is compromised.
Do not wait for a Wildfire warning to start packing. Secure your essential gear today.
View Complete Gear Checklist →Compare Nearby Cities
| City | Risk Score | Analysis |
|---|---|---|
| Los Angeles | 100.0 | Los Angeles and Ontario share similar regional risks, but our data gives Ontario the edge in overall safety. |
| San Francisco | 98.3 | Choosing between Ontario and San Francisco? Ontario presents a unique set of challenges. |
| San Diego | 99.6 | When compared to San Diego, Ontario is slightly higher risk. The difference of 0.3 points highlights local geological and meteorological variations. |
| Riverside | 99.9 | When compared to Riverside, Ontario is statistically safer. The difference of 0.1 points highlights local geological and meteorological variations. |
| Sacramento | 96.3 | Choosing between Ontario and Sacramento? Ontario presents a unique set of challenges. |
Frequently Asked Questions
How common are Wildfires in Ontario?
With a risk score of 99.9 for Wildfire, Ontario is considered highly vulnerable. Residents should have a specific plan for Wildfire events, which are the primary driver of the city's overall risk profile.
Is Ontario safer than other cities in California?
It varies by hazard. While Ontario has its own risk profile (Total Score: 99.8), it is among the higher-risk areas in California. See our state rankings for a direct comparison.
Should I move to Ontario given the risk of Earthquake?
Every city has risks. The threat of Earthquake (Score: 99.9) is manageable with proper preparation. The local infrastructure in Ontario is designed to handle this, but personal insurance and a 'go-bag' are recommended.
How does Ontario compare to other cities in California?
See the full California Disaster Rankings to see how Ontario stacks up against other cities in the state.