Winter Storm Flooding in Arizona: Protect Your Home From Rain
Arizona's winter storms bring slow, steady rain that can last a day or more, plus snow at higher elevations. Water gets into homes through flat roofs, clogged scuppers, low doors, block walls and window wells. Before a storm, clear roof drains and gutters, check grading and door sweeps, and know your main shut-off. If water comes in, remove it and start drying within 24 hours.
Most Arizonans plan for the summer monsoon. Winter storms get less attention, but they cause their own kind of water damage. Instead of a short, violent burst, a Pacific storm can bring hours of steady rain to Phoenix and Tucson and snow to Show Low, Payson and Flagstaff. Roofs and walls that shrug off a 20-minute monsoon can leak after a full day of rain.
If water is already inside, our water removal service Arizona crews respond 24/7. For flooding in Pinal County, see flood damage restoration san tan valley az.
Reading this with water on the floor? Get help first.
Need Help Now? Tap Here(833) 937-0179How is winter rain different from the monsoon?
Monsoon storms are short and intense, with wind and flash floods. Winter storms are longer and colder, with rain that keeps falling for hours or days. That slow soak finds small gaps in flat roofs, stucco cracks and block walls. In the high country, snow and ice add roof loads and ice dams. The National Weather Service Phoenix office posts storm outlooks a few days ahead.
Where does winter rain get into Arizona homes?
- Flat and low-slope roofs with cracked coating or ponding water.
- Clogged scuppers and canales that back water up onto the roof.
- Doors and sliders at or below the patio level.
- Stucco and block wall cracks, especially on the side facing the storm.
- Window wells and frames with old sealant.
- Yards graded toward the house, which send runoff to the slab.
What should you do before a winter storm?
- Clear roof drains, scuppers and gutters of leaves and debris.
- Look for ponding on a flat roof after the last rain. Mark low spots for repair.
- Check door sweeps and the seal at sliders. Keep towels ready at low doors.
- Move valuables off the floor in garages and casitas.
- Clean yard drains and make sure downspouts empty away from the house.
- Cover exposed pipes in the high country. See frozen pipes in Arizona.
- Know your main shut-off in case a roof leak reaches a light fixture or wiring.
What if water comes inside?
Turn off power to wet rooms, then stop the water if you can. Move furniture and rugs out of the water. Photograph everything before cleanup. Water from rain that came through the roof is usually clean at first, but rising floodwater from outside is black water and needs professional cleanup. Start drying within 24 hours to stay ahead of mold.
Homes in the north valley, from Cave Creek to the foothills around water damage restoration carefree calls, see runoff from washes after long storms. If your ceiling is wet, see our sagging ceiling guide first.
How much does storm water damage cost?
| Job | Typical range |
|---|---|
| Water extraction | $500 – $1,500 |
| Drying and dehumidifying (3–5 days) | $1,000 – $3,500 |
| Mold remediation, small area | $1,500 – $4,000 |
Most jobs land between $1,000 and $5,000. Roof repair is a separate cost from the water cleanup.
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Get Expert Help 24/7(833) 937-0179Frequently asked questions
Does it flood in Arizona in winter?
Yes. Long winter storms can bring a day or more of steady rain, which overwhelms washes, yard drains and flat roofs. Snow and ice add risk in the high country.
Why does my flat roof leak only in winter storms?
Long, steady rain gives water time to pond and find small cracks in the roof coating or around scuppers that a short monsoon storm does not reach.
Does insurance cover rain water damage?
Sudden roof or window leaks during a storm are often covered. Rising floodwater from outside usually needs separate flood insurance.
How fast should I dry storm water damage?
Start within 24 hours. Mold can begin growing in 24 to 48 hours once drywall, carpet pad or wood stays wet.
About the author
Noah Miller founded AZ Water Damage Help in Queen Creek to give Arizona homeowners fast, honest water damage help. He writes and updates these guides using public guidance from the EPA, the IICRC, the National Weather Service and Arizona state agencies. More about Noah.