Please help

[iceicebaby]

Hi this orchid of mine looks shriveled and dehydrated.
it has some dead roots and some growing ones.
I had put it one a humidity tray.I mist it once daily and water it once a week but not much change since last one month.
it is important to mention that a month back it was really hot and dry in my part of India.
How can its condition improve.

Dev