FEMA NRI 1.19.0Updated Nov 2023 · Coverage 2014–2023Methodology

Arizona Disaster Risk

Natural disaster risk data for all 15 counties.

Avg FEMA Rating

Relatively Moderate

Avg Percentile

85th

Counties with Data

of 15 total

County risk atlas

Arizona hazard exposure by county

A compact 2.5D surface of FEMA National Risk Index percentiles. Toggle composite, flood, wildfire, hurricane, tornado, and earthquake risk to see which counties carry the highest relative exposure without loading the full national explorer dataset.

Counties

15/15

Avg composite

85th

Risk layers

Highest Risk Counties

Maricopa County

Very High

100th percentile

Pima County

Relatively High

99th percentile

Mohave County

Relatively High

95th percentile

Coconino County

Relatively Moderate

94th percentile

Pinal County

Relatively Moderate

94th percentile

Lowest Risk Counties

Greenlee County

Very Low

12th percentile

Graham County

Relatively Low

65th percentile

Apache County

Relatively Low

79th percentile

La Paz County

Relatively Moderate

84th percentile

Navajo County

Relatively Moderate

88th percentile

All Arizona Counties

County	Percentile	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
Maricopa County	100th	Very High	99.9	99.6	84.0	96.8
Pima County	99th	Relatively High	99.5	99.7	37.5	91.7
Mohave County	95th	Relatively High	97.1	98.8	3.3	87.1
Coconino County	94th	Relatively Moderate	96.5	99.4	24.3	90.4
Pinal County	94th	Relatively Moderate	96.4	98.0	37.1	79.8
Yavapai County	94th	Relatively Moderate	96.1	99.6	32.7	85.3
Cochise County	93th	Relatively Moderate	93.8	99.2	10.4	78.5
Yuma County	93th	Relatively Moderate	91.0	59.2	14.0	98.4
Gila County	90th	Relatively Moderate	93.1	99.1	13.4	59.0
Santa Cruz County	88th	Relatively Moderate	87.4	98.1	8.7	43.5
Navajo County	88th	Relatively Moderate	89.5	98.8	8.0	81.2
La Paz County	84th	Relatively Moderate	91.5	70.2	4.6	79.0
Apache County	79th	Relatively Low	80.7	97.9	3.6	67.7
Graham County	65th	Relatively Low	67.9	94.3	2.7	47.9
Greenlee County	12th	Very Low	29.6	82.5	1.2	22.0

Frequently Asked Questions

Which county in Arizona has the highest natural disaster risk?

Maricopa County has the highest natural disaster risk in Arizona, rated Very High (100th percentile nationally), based on FEMA National Risk Index data.

Which county in Arizona is the safest from natural disasters?

Greenlee County has the lowest natural disaster risk in Arizona, rated Very Low (12th percentile nationally), based on FEMA NRI data.

What natural disasters are most common in Arizona?

Arizona counties face varying levels of risk from floods, wildfires, tornadoes, earthquakes, and hurricanes. The FEMA National Risk Index scores each county across 18 hazard types. See individual county pages for detailed hazard breakdowns.

How is natural disaster risk measured by county?

The FEMA National Risk Index (NRI) measures natural disaster risk using expected annual loss, social vulnerability, and community resilience. Scores are normalized nationally, with ratings from Very Low to Very High across 18 natural hazard types.

Prepare your household for natural disasters

FEMA's Ready.gov provides county-specific preparedness checklists and emergency planning guides.

FEMA Ready Guide →

Data Source

Risk data sourced from the FEMA National Risk Index (NRI). Risk scores are relative rankings (0–100) across all US counties — not absolute risk measures. Higher scores indicate higher relative risk compared to other counties.

Disclaimer: This data is informational only. It is not financial, insurance, or legal advice. Always consult a qualified professional before making insurance or real estate decisions.

← Back to All States

Explore more data for Arizona

Property Tax Cost of Living Crime Rate Income Health Schools Water Quality Weather County Score