Winter Storms risk in Arizona

The call usually comes in February, from someone in Show Low or Flagstaff or a cabin above Prescott. The roof is sagging, or a pipe let go in a wall while they were gone for a week. Arizona winter storms don't look like the ones on the national news, and that's exactly the problem — people here don't always plan for them.

Arizona's statewide winter storm risk sits at 2 out of 5. That's an average, and averages lie in a state with this much elevation change. Phoenix and Yuma may go years without a hard freeze. Meanwhile Coconino, Apache, and Navajo counties get buried. The Mogollon Rim, the White Mountains, the Kaibab Plateau, and the San Francisco Peaks can pick up feet of snow in a single storm. So can the mountains around Tucson — Mount Lemmon and the Santa Catalinas — and the Chiricahuas in Cochise County.

You don't need a blizzard to have a bad week. Six inches of wet snow on a tired roof, a night at 24 degrees in a garage with a water heater, or an ice storm that takes down a power line in Gila County will do it.

Who this hits hardest

High-country homeowners carry the most risk. If you live in Flagstaff, Williams, Pinetop-Lakeside, Greer, Alpine, Payson, or Prescott, snow load and freeze damage are real annual concerns, not once-a-decade events. The same goes for parts of Graham and Greenlee counties up in the mountains, and the Hualapai and Cerbat ranges in Mohave County.

Second homes and rentals get hit next. A cabin that sits empty for three weeks in January is a freeze claim waiting to happen. Most policies have language about reasonable care and vacancy — if you turn the heat off and a pipe bursts, the adjuster may say no.

Then there are the low-desert surprises. A hard freeze in Maricopa or Pinal County catches exposed pipes in garages, backyards, and mobile home skirting. Citrus and garden plants in Yuma and Pima County take a hit. Ranchers in Santa Cruz and Cochise counties deal with livestock and water lines. And because Arizona soils and drainages are built for flash floods, rain-on-snow or a fast melt can send water into places that never see a river.

After the event — claims and repairs

Take photos before you clean up. Save receipts for tarps, hotel rooms, and emergency repairs. Your adjuster will ask for them.

Homeowners insurance in Arizona usually covers sudden winter damage: the weight of ice or snow that caves in a roof, wind that peels off shingles, a tree that falls on the house, and a pipe that bursts when the heat was on. What it often does not cover: freeze damage in a vacant or unheated home, gradual damage from a leak you ignored, and — this is the big one — flood.

Flood is almost never in a standard homeowners policy. Snowmelt running into a low spot, an arroyo jumping its banks, or rain on frozen ground is a flood claim. That's the National Flood Insurance Program or a private flood policy. Plenty of Arizona properties outside the mapped high-risk zones still get water. Check FEMA's flood maps and ask a local agent.

Ice dams sit in a gray area. Some carriers pay as water damage; some argue maintenance. Read your policy before you need it, not after.

If I had one weekend and a few hundred dollars, I'd insulate and heat-trace the pipes in the coldest crawl space, then buy a roof rake. Those two moves prevent the most common winter claims I hear about in Arizona.

In a small town, good contractors book out fast. Get on a list in October. FEMA individual assistance only shows up after a federal declaration, and it's not a substitute for insurance. The Arizona Department of Emergency and Military Affairs coordinates the state response, but your county emergency management office is who you'll actually hear from.

Before the season starts

Walk your house in the fall, not during a storm.

• Insulate exposed pipes in the attic, garage, and crawl space. Disconnect hoses. Know where your main shutoff is.
• Winterize evaporative coolers and pool equipment. A split pump housing is a spring bill you don't want.
• Look at the roof. Fix lifted shingles and clear gutters before snow or ice.
• Trim trees that overhang the house or power lines.
• Keep a generator, flashlights, batteries, food, water, and a carbon monoxide detector. Never run a generator or grill indoors.
• Have a plan for prescriptions and for checking on older neighbors.

CDC's cold-weather guidance covers hypothermia and carbon monoxide — both are real risks in a power outage, even in Arizona. Ready.gov has a basic winter kit list. And your county emergency management office often runs alert sign-ups.

Questions we get

Does homeowners insurance in Arizona cover snow damage to my roof?

Usually yes, if the damage came from the sudden weight of snow or ice. Wear-and-tear, rot, and neglected maintenance are typically excluded. Take photos, tarp it, and file the claim.

Do I need flood insurance in Arizona if I don't live near a river?

Consider it. Snowmelt, rain-on-frozen-ground, and arroyo flooding can reach properties well outside mapped flood zones. Homeowners policies exclude flood, so you'd need NFIP or a private policy. Ask your agent what your actual drainage looks like.

What should I do first when a winter storm warning is issued for my county?

Charge phones, fill water containers, drip faucets, open cabinet doors under sinks, and bring pets inside. Know how to shut off your water. Check on neighbors who live alone. Then follow your county emergency management office and the National Weather Service for updates.

Official sources

• Arizona Department of Emergency and Military Affairs
• National Weather Service — Winter Weather Safety
• Ready.gov — Winter Weather
• CDC — Winter Weather