If possible, put this plant outside under a shade tree or an area where it will not get direct sunlight, but very medium light until it is healthy again. Then give it a good soak once a day. Take a large bucket and lower the basket roots and all down into the water and let it sit there for 15 min or so, then lift it out of the water and hang it up to dry. The moss should retain some moisture for most of the day. The outside wind and heat should mostly dry it out again by evening. Spray/ or heavily mist the leaves also. Once a week, fertilize as you would normally.

Something to remember is that once an orchid is de-hydrated to this point, it will take it a long time to come back. By now, (two months in spag) you should begin to see some green root tips.

In the photo it looks like there are some completely dried-out roots. These roots will not come back. Once they get to the brittle point, they will not grow again, however, do not remove them yet. Let the plant get healthy and then you can clean up the dead roots. It will become apparent which are healthy and which are dead.

Also, don’t expect to see new leaf growth on this plant this year. It will have to get healthy before it can grow new leaves. Right now, you should focus on creating an environment where it is getting lots of humidity. That is the best way to turn this orchid around. JMHO

After the plant is healthy again, increase its light level and keep the humidity up and it should bloom. Do not put this plant in bright light until it has a chance to recover. It could kill itself trying to bloom.

Cheers!
BD