Oro Valley, AZ
Local storm history & FEMA National Risk Index data
Oro Valley is rated Relatively High for overall natural hazard risk — higher risk than most US counties — based on FEMA's National Risk Index for Pima County, AZ. The county's highest-rated hazards are heat wave, wildfire, and inland flooding.
Storm events near Oro Valley
NOAA-recorded tornado, hail, and flood events within 25 miles of Oro Valley's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Oro Valley itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Pima County's FEMA National Risk Index scores, covering Oro Valley along with the rest of the county, not a Oro Valley-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 99.7 | Relatively High |
| Inland Flooding | 99.5 | Very High |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 91.7 | Relatively Moderate |
| Heat Wave | 99.8 | Very High |
| Tornado | 37.5 | Relatively Low |
| Avalanche | 46.3 | Very Low |
| Cold Wave | 3.1 | Very Low |
| Drought | 69.6 | Relatively Moderate |
| Hail | 91.8 | Relatively Moderate |
| Hurricane | 18.7 | Very Low |
| Ice Storm | — | Not Applicable |
| Landslide | 58.7 | Very Low |
| Lightning | 97.7 | Very High |
| Strong Wind | 82.6 | Relatively Moderate |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 80.9 | Relatively Moderate |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Pima County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Pima County:
More on Pima County:
Frequently asked questions
What natural hazards is Oro Valley, AZ at risk of?
Oro Valley is rated Relatively High for overall natural hazard risk by FEMA's National Risk Index — higher risk than most US counties. The highest-rated hazards for Pima County, where Oro Valley is located, are heat wave, wildfire, and inland flooding.
What is Oro Valley's biggest natural hazard risk?
Heat Wave is the highest-rated hazard for Pima County, where Oro Valley is located, scoring 99.8 out of 100 on FEMA's National Risk Index (rated "Very High").
Is Oro Valley a high-risk area for natural disasters?
Yes — Oro Valley carries higher risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively High" for Pima County.
Has Oro Valley had tornadoes, hail, or flooding?
NOAA has recorded 5 tornado, 40 hail, 156 inland flooding events within 25 miles of Oro Valley since 2016.