Many of the trees planted here can handle the harsh climate of Las Vegas summers and infrequent watering [1], not even mentioning that we recycle nearly 40% of our water and are amongst one of (if not the most) water efficient cities in the world [2].

If you can't tell I'm a bit of a proud Las Vegas local having grown up here, so there's bias in my words.

[1] https://knpr.org/norms-favorite-desert-trees [2] https://lvgea.org/water/