Arizona Wildfire Protection Guide: How to Safeguard Your Home & Family

By the Mercury Team

Wildfires are a real part of life in Arizona, and they’re not always rare, remote events. According to the most recent data from the Arizona Department of Forestry and Fire Management, Arizona saw 2,162 wildfires that burned more than 280,000 acres across state, federal, and tribal lands in 2024. More than 1,400 of those fires were caused by humans.

Numbers aside, the goal is simple: keep your people safe and protect what you’ve built. And the best time to do that is before there’s smoke in the air.

This guide covers how wildfires start, how to protect your home with defensible space and simple upgrades, and what to do before, during, and after a wildfire.

Why Arizona Faces a High Wildfire Risk

Arizona’s wildfire risk comes down to a few things: heat, dry air, wind, and what’s growing nearby. And that last part matters more than most people think. Arizona’s landscapes change a lot from one region to the next. In some places, invasive grasses have also moved in and created more easily-burning fuel than the area previously had.

Here’s how that plays out around the state:

• Desert and desert-edge neighborhoods (like areas near open desert or washes around Phoenix, Scottsdale, Mesa, and Tucson) can see fires move fast through dry grass and brush, especially on windy days. In spots where invasive annual grasses have filled in, fire can spread more easily because the fuel is more continuous.
• Foothill and brush areas (common in parts of Maricopa, Pinal, and Pima counties) often have thicker vegetation close to homes. That’s why defensible space is essential in these areas. When brush grows right up against structures — or acts like a “ladder” up into trees — it can increase heat near the home and kick off more embers.
• Rim Country and higher-elevation communities (around the Mogollon Rim and near places like Payson, Prescott, Flagstaff, Sedona, and the White Mountains) may face risk from denser vegetation and forest fuels. These fires can throw embers far ahead of the main fire line, which is why roof and vent protection matter so much in these areas.

The risk of Arizona wildfires also increases in the wildland-urban interface (i.e., where neighborhoods meet open land). In these areas, you don’t need flames at your front door for damage to happen. Windblown embers can land on a roof, be pulled into a vent, or collect under a deck and ignite on their own.

What Causes Wildfires in Arizona?

While weather conditions fuel the spread of fires, the ignition sources vary. Knowing what causes wildfires can help you spot potential hazards in your own community.

How Do Wildfires Start? The Most Common Causes

Wildfires usually start due to human activity. According to research from the U.S. Department of Agriculture, humans are responsible for nearly 84% of wildfires in the U.S. Common human-related causes include:

• Equipment use: Sparks from lawnmowers, chainsaws, or metal grinders striking rocks can ignite dry grass.
• Vehicles: Dragging chains, worn brakes, or parking on dry vegetation can spark a blaze.
• Campfires: Unattended or improperly extinguished campfires are a major source of ignition.
• Power lines: High winds can damage electrical infrastructure, causing sparks that ignite nearby brush.

Nature can start fires, too. Lightning is a big one, especially when storms bring a lot of lightning but not much rain. In those moments, a single strike can spark a fire in a remote area, and it may grow for a while before anyone even sees it.

Environmental Factors That Make Arizona Vulnerable

Even when a fire starts small, local conditions can help it grow fast:

• Low humidity and heat can dry out grass and brush across lower elevations and desert-edge areas.
• Wind can push flames forward and carry embers into neighborhoods, including areas miles from the main fire.
• Fuel type varies by region. Invasive grass and brush, like buffelgrass and red brome, can spread fire quickly, while denser vegetation can increase heat intensity and ember exposure.

How to Fireproof Your Home From Wildfires

No home is 100% fireproof, but you can lower the risk of damage by reducing the chances of your home igniting. The biggest threat for many homes is windblown embers, not just direct flames. Here’s what you can do:

Create a Defensible Space Around Your Property

Defensible space is the buffer zone you create between your house and the surrounding wildland area. It’s designed to slow or stop the spread of wildfire and provide a safe area for firefighters to defend your home. Experts recommend managing this space in zones:

• The Immediate Zone (0–5 feet): This is the most critical area. Remove all flammable materials, including dead leaves, wood piles, and combustible patio furniture. Don’t use wood mulch right up against the house. Use gravel or stone instead.
• The Intermediate Zone (5–30 feet): Keep grass mowed short (under 4 inches). Space out trees and shrubs to prevent fire from climbing from the ground to the tree crowns (ladder fuels).
• The Extended Zone (30–100 feet): Remove dead vegetation and heavy accumulation of debris. Thin out trees and shrubs to interrupt the path of the fire.

For a visual guide on setting up these zones, check out this wildfire preparation infographic.

Fire-Resistant Upgrades to Protect Your Home

If you’re deciding where upgrades matter most, prioritize places where embers can enter or collect, such as:

• Roof: A Class A fire-rated roof (such as asphalt shingles, metal, or tile) offers the best protection. Keep it clear of pine needles and leaves.
• Vents: Cover all attic and foundation vents with 1/8-inch non-combustible metal mesh to prevent embers from entering your home.
• Windows: Radiant heat can shatter standard windows, allowing fire inside. Install dual-pane windows with tempered glass, which are more resistant to high heat.
• Decks and Fences: Use non-combustible or fire-resistant materials for fences within 5 feet of the home. Ensure that fencing doesn’t act as a wick, which can allow fire to directly reach your siding.

Home Systems & Maintenance Habits That Reduce Risk

Regular maintenance is a key part of fireproofing. Clean gutters frequently, as dry leaves caught in gutters are a common ignition point for embers. Store flammable chemicals and propane tanks at least 30 feet away from the home.

Protecting Your Family Before, During & After a Wildfire

Home hardening matters, but a household plan matters just as much. Here’s how to prepare, what to do if a fire is approaching, and what to do after.

What to Do Before a Wildfire Threatens Your Area

Don’t wait until you smell smoke to prepare for a wildfire. Be sure to:

• Create an Emergency Plan: Ensure every family member knows two ways out of every room and two evacuation routes out of your neighborhood.
• Prepare an Emergency Survival Kit: Pack essentials such as prescriptions, important documents, water, non-perishable food, and phone chargers.
• Stay Informed: Sign up for your local county’s emergency alert system.
• Review Insurance: Make sure your policy is up to date and covers current rebuilding costs.

What to Do When a Wildfire Is Approaching

If an evacuation order is issued, leave immediately. Delaying can put your life and the lives of first responders at risk.

• Evacuation: Follow the routes designated by emergency officials.
• If Trapped: If you cannot leave, shelter in a room with low WUI exposure, away from windows. Close all windows and doors to prevent smoke and embers from entering, but leave them unlocked for firefighters.
• Pets: Bring pets with you and ensure they have access to water and food.

Returning Home Safely After a Wildfire

Don’t return home until officials declare it safe. Once allowed back, check for hot spots in your yard and roof. Be cautious of structural damage and ash, which can be toxic. Document any damage with photos before moving debris, and contact your insurance provider immediately to start the claims process.

Insurance Protection: How Mercury Helps Arizona Homeowners

Recovering from a wildfire is emotionally and financially taxing. Having a reliable insurance partner like Mercury is key to resilience.

“If you ever need to evacuate, you’ll have a lot on your mind,” says Holly Sacks, Director, Portfolio UW and CAT Management. “Knowing your coverage basics ahead of time can make the recovery process feel more manageable.”

Why the Right Homeowners Insurance Matters in a Wildfire-Prone State

Standard homeowners insurance policies generally cover fire damage, but coverage limits vary. In a high-risk state like Arizona, it’s important to have:

• Dwelling Coverage: To pay for rebuilding your home.
• Personal Property Coverage: To replace furniture, clothes, and electronics.
• Additional Living Expenses (ALE): To cover costs like hotels and food if your home is uninhabitable.
• Additional Replacement Cost: To provide additional coverage when home repair demand surges from wildfires damaging multiple homes in the same area.

Mercury supports customers through the claims process with a 24/7 claims hotline, so you have support when you need it most. We also encourage annual policy reviews to ensure your coverage keeps pace with inflation and home improvements.

Learn more about our Arizona homeowners insurance options.

How Mercury Agents Support You

Mercury’s network of local independent agents understands the specific risks associated with Arizona’s terrain and climate. They can help tailor a policy that fits your budget while providing the comprehensive protection your family needs. Find a local expert through our list of Arizona Insurance Agents.

Final Tips for Staying Safe During Arizona Wildfire Season

Wildfire safety in Arizona is a year-round commitment. Be sure to maintain your defensible space, stay alert to weather conditions, and keep your insurance policy current so you can face the unexpected with confidence. And remember, the best time to prepare for a wildfire is before the smoke appears on the horizon.

Want to make sure your home is protected before wildfire season ramps up? Mercury can walk you through your options and help you find coverage that fits your Arizona home.

Contact us today for a fast, free quote!

Wildfire FAQs for Arizona Residents

Take a look at some frequently asked questions about wildfires.

Are wildfires common in Arizona?

Yes. Arizona’s heat, seasonal dryness, and regional vegetation make wildfire seasons a recurring concern — especially in areas close to brush or forest.

What should I do to prepare my home for a wildfire?

Start with defensible space (especially the 0–5 foot Immediate Zone), reduce ember entry points (vents, gaps, debris), and stay on top of roof and gutter maintenance.

What are the first steps after wildfire damage occurs?

Prioritize safety first, document damage with photos, prevent further loss if it’s safe to do so, and contact your insurer to begin the claims process.

For more answers to common concerns, visit our page on wildfire facts and frequently asked questions.