Storm & Flood Damage Recovery in Peoria, AZ

That is how they work, and it is also why their capacity matters. A basin holds runoff on site and empties by evaporation and slow seepage rather than by draining anywhere, which takes days. A basin still holding water from the last storm has less room for the next one. If one seems to be holding water far longer than it used to, its floor may have sealed, which is a maintenance question worth raising.

Plumbing and appliances rather than weather. Supply lines, water heaters, and washer and refrigerator connections account for most interior water in a desert, and slab construction sends the water sideways under the floor so it surfaces late and often in a different room. Knowing where the main shutoff is, and replacing a water heater at the end of its service life, covers most of the realistic risk.

It is a watercourse and it behaves like one when its catchment gets rain. Ground here absorbs almost nothing, so a monsoon cell fills a wash within minutes with flow that carries debris. Because it looks like open desert most of the time, people fence, store, and build close to it. Treating it as a channel rather than as landscape is the correct posture, particularly downstream of anything recently graded or burned.