I’m not sure how much of an issue stormwater management is, in Arizona, but that was something my mother harped on, in Maryland.
Developers hate stormwater management, with a burning passion. My mother was not popular with them. Planned communities were notorious for not, er…planning for stormwater management. It usually required setting aside significant acreage, and doing a lot of fill work.
It was a really big deal, though. The communities that cut corners, suffered millions of dollars in damages, and often multiplied damages in other communities.
The dirty little secret about all these natural disasters; earthquakes, wildfires, volcanoes, tornadoes, etc., is that the single deadliest and most destructive force in nature, is good ol’ H2O.