Arizona natural hazards and home insurance: heat, floods, fire

How dangerous is extreme heat in the Phoenix area?

The Maricopa County Department of Public Health has tracked heat deaths every year since 2006. Its April 2026 report gives these figures for 2025:

The report ties these deaths mostly to outdoor exposure: 74% of heat-related deaths occurred outdoors, and 49% involved people experiencing homelessness. The indoor figures matter most to homeowners and buyers:

• Among indoor deaths, an air-conditioning unit was present in 94% of cases, and it was not working in 72% of those.
• About 23% of indoor deaths happened in an RV, trailer or mobile home, which make up only 5% of housing structures in the county.
• 90% of indoor deaths involved people aged 50 or older, and 48% of indoor deaths were found during a welfare check.

The county does not draw buying advice from these numbers, but the pattern is clear: a working cooling system is a safety item. Ask for the age and service records of the air conditioner, and see home inspection cost for what an inspection covers.

What flood risk exists in a desert?

The Flood Control District of Maricopa County says floods happen even in the desert, mainly during summer monsoon storms and winter rainstorms. The District lets owners check whether a home or business is in a FEMA-designated 100-year floodplain, and its phone line is 602-506-1501.

FEMA’s flood maps divide the country into zones. According to FloodSmart:

• Zones A, AE, AH, AO, AR and A99 are high-risk flood areas.
• Zones B, C and X are moderate- to lower-risk areas, though FloodSmart notes that some local drainage problems may occur.
• Zone D is undetermined: no flood analysis has been done.

You can find a property’s zone at the FEMA Flood Map Service Center (msc.fema.gov) or through the local floodplain administrator.

Do you need flood insurance in Arizona?

The rule is federal, not Arizona-specific. FloodSmart states that if your property is in a high-risk zone and you have a federally backed mortgage, you are required to buy flood insurance as a condition of the loan. In other zones, it is not required by law but is recommended. FEMA says anyone in a community that takes part in the National Flood Insurance Program (NFIP) can buy a policy, and that a new policy typically takes effect 30 days after purchase. The wait does not apply when a lender requires the coverage or when it is tied to a flood map change.

Two facts explain why buyers in low-risk zones still look at it:

• “Most homeowners insurance excludes flood damage” (FloodSmart). Flood coverage is a separate policy that can cover the building, its contents or both (FEMA).
• From 2014 to 2024, 29% of NFIP claims nationwide came from areas outside current high-risk flood zones (FloodSmart).

The premium depends on where the building is, how it is built and what coverage and deductible you choose, including the building’s distance to flooding sources, its elevation and its foundation type (FloodSmart, Premium Costs). FloodSmart notes that flood policies do not renew automatically. For the basics, see the flood insurance guide and the homeowners insurance guide, and ask a licensed insurance agent for a quote on a specific address.

What about wildfire and the state insurance market?

Wildfire matters for homes next to forests or brush, and the Arizona Department of Forestry and Fire Management is the state agency to ask about local risk. The Arizona Department of Insurance and Financial Institutions (DIFI) regulates insurers and takes consumer complaints. Payotte does not publish figures here on Arizona wildfire losses, premiums or non-renewals, because we could not read the state sources for them. Check DIFI directly for the rules on cancellation and non-renewal that apply to your policy. For any home, get insurance quotes before you remove your contingencies; see home buying steps.

What does a seller have to disclose about floods and soil?

Arizona’s statutory disclosure for hazards is narrow. A.R.S. § 33-422 requires a seller of five or fewer parcels of land, other than subdivided land, in an unincorporated area of a county to give the buyer a sworn affidavit of disclosure at least seven days before the transfer. The buyer has a right to rescind for five days after receiving it. The affidavit must state whether any part of the property is in a FEMA-designated regulatory floodplain and whether it is subject to fissures or expansive soils. For other sales, see seller disclosure in Arizona. For a city-level view, see Phoenix.