The U.S. had not committed to giving Ukraine its F-16s, but images of the type being flown out of Arizona on a Ukrainian An-124 began circulating last week. The non-operational F-16s appear to be the first examples supplied directly to Ukraine from U.S. stocks.
As long as all openings are tightly closed the heat and dryness in the desert should keep them usable.
I forget about the wonders of desert life