Hi I've been growing Neps for about 2years now, I love them and am very interested in them. my fianc� ordered me a bunch of new baby Neps online, when we got them we set up a new small 4tier clear plastic greenhouse with a shade cloth above it. When I left early in the morning for work it seemed ok but when I got back this afternoon the shade cloth had fallen down leaving the greenhouse in the full morning sun:/ it only had one zipper open half way so was very humid and hot in there.. The ones on the top shelf were very wilted:( I immediately took them out and put them in the shady cool spot with fresh cool water but now some of the younger ones are turning brown and look very wilted;( I'm so worried they might die does anyone know what I should do to help them? Any advice would be greatly appreciated, I really want to save my plants.. Thanks in advance..

In the picture I've included: the seedlings are browning and wilted, I realllyy want to save them they cost my partner a lot of money and I love them and look forward to seeing them mature, please let me know the best thing to do to get them healthy again...
Thanks