Hey there Richard, welcome to the Orchids forum. Yes, as Carol said, I have a daughter who lives in Utah. Similar dry, hot environment (at least in summer) to where you are.
She pestered me until I bought her an orchid which she keeps in her bathroom. Luckily it has a nice big south-facing window so lots of good light, and of course it is the most humid place in their house as well. Her orchid is an Oncidium, not a Phalaenopsis, though because I thought it had a better chance of survival in her dry climate. She's managed to keep it alive and even re-bloomed it twice in two years. A minor miracle.
Jim's given you excellent advice on how to keep your little orchid going, so I won't belabor it. As Carol said, if you do use a swamp cooler to cool your home, that will help your orchid a lot with regard to raising the humidity for it. They can be "divas" but are lovely and the flowers last very well. One more tip, for when you re-pot is to buy pots that have ventilation holes as well as drainage holes. Phals love to have lots of air circulation around their roots.
I think I see some sphagnum moss in those pots you have there. That medium is notorious for packing too tight, holding a lot of water and for breaking down very quickly as well. If you can gently wiggle a chop stick or something down into the medium, it will help your plants to "breathe" better while they are still blooming. Then by all means re-pot and change the mossy medium for some orchid bark.
