Hour one is about the source: main shutoff or appliance valve, power off to wet rooms if water is near outlets, and phone photos of everything before it moves. Insurers and adjusters work from documentation, and the first hour is when the documentation is honest.
In Mesa, check the AC too: a large share of 'mystery water' here is a clogged condensate line, and it keeps dripping until the unit is off. During monsoon evenings, the second source is the roof - put a bucket under the drip, photograph the stain's growth between storms, and note which storm cell produced it.
Hours two to six are extraction territory. Standing water does not wait politely: it wicks up drywall roughly an inch an hour at first and runs under flooring along the subfloor. A shop vac handles a spill; a room of water needs truck-mounted or portable extraction and then real drying equipment, not a box fan.
By hour twenty-four the question changes from 'is it wet' to 'what is still wet.' Moisture meters, not fingertips, answer that. If a contractor cannot show you readings, the drying is a guess - and guesses are how mold shows up in month two.
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