https://news3lv.com/news/special-reports/underground-evaporation-more-than-lake-mead-is-drying-up
Admittedly, the collapses are very rare and to make sure that Las Vegas' aquifer stays healthy, the Water Authority pumps it up, artificially filling it with excess water from the Colorado River.
That's how it went until six years ago, when Lake Mead was getting so dangerously low that they needed to fill instead.
https://www.igrac.net/facilitating-millions-of-gamblers-in-las-vegas-creates-groundwater-overpumping.html