Yeah, with that heat I can see why you would need to water. The 90s are generally the hottest it gets here and 80s are normal for summer.

Wind breaks are a great option. You might also want to see about growing vegetables in semi-shade. There are a number that don't mind it. I have a kale growing under a cherry tree on the north side of a hugelkultur bed. It gets very little sun but is growing happily in its second year.

Back when I was renting I grew a lot of greens in semi-shade on a small patio. They grew slower but lasted a lot longer than the ones in full sun and still provided a great harvest.

Good luck with the heat and thanks for the comment!