DIFI: "Home Insurance covers sudden, accidental damage and catastrophic losses." On water: "Water damage and mold remediation, not caused by a flood, may be covered if they are the result of a sudden or accidental event." A supply line that lets go under the kitchen sink is sudden. A fitting that has wept into the slab for a year is not, and the standard form excludes wear and deterioration and, in most current editions, repeated seepage over weeks or months. The evidence decides which you have.
The standard homeowners form, ISO HO 00 03, also excludes, verbatim:
- "Flood, surface water, waves, tidal water, overflow of a body of water". DIFI defines flood for Arizona homeowners as "any water outside your home that flows inside at ground level" and calls it "strictly excluded from standard homeowners insurance". Monsoon sheet flow under a Buckeye garage door is this exclusion. Why a house nowhere near water takes on water explains the maps.
- "Water or water-borne material which backs up through sewers or drains". Coverage exists as an endorsement, priced separately. Ask your agent before the monsoon.
Flood insurance has a waiting period.
DIFI: "There is generally a 30-day waiting period before a new National Flood Insurance Program (NFIP) policy takes effect." FEMA’s exceptions: coverage required by a government backed lender at a loan closing, or a purchase tied to a community flood map change. FloodSmart, the NFIP’s own site, reports that from 2014 to 2024 nearly a third of NFIP claims, 29 percent, came from outside the mapped high risk areas. The Flood Control District of Maricopa County: "You do not need to live near water to be flooded." A floodplain determination from the District is free at 602-506-2419, or look the address up on the FEMA Flood Map Service Center.