Water damage, by source
Extraction is the opening stage of nearly every water-damage job: stop the source, pull the water off slab floors and out of carpet, then measure how far the moisture really went.
Order matters more than speed. Close the main shutoff, or the small valve under the fixture that failed, before touching anything else. If water has reached outlets, power strips or a plugged-in appliance, stay out of that room and switch off the breaker only when the panel is dry and you can reach it while standing on a dry floor. Maricopa County notes that electric service in the county comes from SRP or APS depending on the address, so it helps to know which utility serves the house before an emergency rather than during one.
Take photos and short videos of every wet room before furniture moves, including the water line on walls and cabinet bases. Some spills really are a homeowner job: a sink overflow on tile that you can mop up right away, that never ran under baseboards or into a neighboring room, usually needs nothing more than towels, a fan and a look the next morning. Call when water has soaked carpet pad, gone under interior walls, reached a second room, or dripped through to a unit or ceiling below.
Contractors use submersible pumps where water stands deep, then truck-mounted or portable extractors with floor wands for whatever remains. On carpet, a weighted stand-on tool squeezes water out of the pad that a wand alone leaves behind. What happens to carpet and pad depends on the category of water under the S500 standard: Category 1 comes from a clean supply such as a broken line, Category 2 carries contamination such as washer or dishwasher discharge, and Category 3 covers sewage and floodwater from outside. Porous materials soaked by Category 3 water are normally removed rather than cleaned.
Every gallon left behind has to be evaporated later, which takes far more time and equipment than pulling it out as liquid. That is why technicians often lift baseboards, open toe-kick panels under cabinets and check behind appliances before declaring extraction done. A moisture meter and a thermal camera trace the wet edge past where the floor looks dry, and those readings become the map that the structural drying plan is built on. A shop vacuum can help with a small clean spill on hard flooring, but it cannot reach water trapped in pad.
Mesa recorded 4.41 inches of rain in one day on Sept. 8, 2014, when a retention basin overflowed near US 60 and Stapley Drive and submerged a neighborhood; jobs like that begin with pumps and extractors.
Slab construction turns up again and again in local housing records. Scottsdale's historic-preservation study of its 1960s and early 1970s townhouses describes them as slab-on-grade with no basement, and Tempe's Borden Homes, built from 1947, also sit on slab foundations. With no crawl space or basement to drain into, water spreads sideways under tile, laminate and tack strip, then wicks into the bottom plates of interior walls. A tiled floor can look dry on top while the mortar bed below still holds water, so readings are taken through grout lines and at the base of walls.
Masonry adds its own pattern. Older Valley houses often have block walls, from the painted slump block noted in a 1977 Dobson Ranch home in Mesa to the Superlite block used in Scottsdale's Village Grove. Block does not swell or crumble the way drywall does, but where drywall is attached over furring strips on the inside face of a block wall, a narrow cavity forms that holds moisture against both surfaces. Technicians check those walls separately, because a dry reading on the paint can hide a wet cavity.
Once the standing water is gone, the job turns to evaporation: air movers across wet surfaces, dehumidifiers sized to the space, and daily readings until materials reach a dry standard set for that house. Storm season changes the air the equipment works against. On Sept. 16, 2026 the National Weather Service recorded a record mid-September precipitable water value of 2.10 inches, the kind of moist air that keeps a closed-up house damp after a storm unless dehumidifiers are running.
Keep the extraction notes, photos and moisture map together, since an adjuster will ask for them; the claims paperwork guide lists what usually helps. This line handles water damage only; fire, smoke and mold removal are not covered. Drying promptly after extraction is still the main way to keep growth from starting, which is covered in keeping mold from taking hold.
While equipment runs, keep windows and doors closed unless the technician says otherwise, because humid storm-season air coming in adds moisture the dehumidifiers then have to pull back out. Expect a technician to return to take readings, shift air movers as areas dry, and move equipment toward the wettest spots. If readings stall, the usual causes are a wet cavity behind cabinets, water held in a tile mortar bed, or a second leak that was never found, and each should be checked before the equipment leaves.
As soon as the source is stopped and the room is safe to enter. Water keeps moving into pad, drywall and cabinet bases while it sits, and materials reached within the first day or two can often be dried in place instead of replaced.
For a small clean-water spill on tile or vinyl, yes. A shop vac cannot pull water out of carpet pad, wall cavities or a slab, and it should never be used on sewage or on floodwater that came in from outdoors.
Policies differ, so read yours and call the insurer. Many cover sudden, accidental water such as a burst line but exclude gradual leaks, and surface water that flows in from outside usually needs separate flood coverage.