Here is a link to a story about the Lemmon Valley floods that happened over a year ago.
"Last winter yielded record precipitation. Strong early season storms left a significant snowpack on Peavine Mountain. Then, a series of nine atmospheric river rainstorms hammered Lemmon Valley, one after another."
"The rain completely saturated the soil and the water poured into Swan Lake. In closed basins such as Lemmon Valley, Stead and Cold Springs, there is nowhere for the water to go but the lake and no way for the lake to empty but through the slow process of evaporation."
"As the rebounding economy fuels a boom in new construction — much of it slated for the North Valleys, including areas currently underwater, and in other flood zones — city officials are grappling with how much to restrict developers in the closed basins so as not to make the flooding situation worse."
Enjoy the rest of the story on RGJ's website.