Are they shrivelled up and crunchy i.e. definitely dead, or are they just really wilty but still green and floppy? If they are still green, they may recover overnight, just make sure they have enough water as they will need to have a good drink to get themselves back together again.

My peppers and pumpkins both suffered very badly on a hot day a couple of months ago - when I wasn't looking they wilted to all but dead but apart from a few damaged leaves they recovered amazingly well and are now going great guns. I just kept them in a cooler, shadier place until they perked up, it was amazing how quickly they recovered and I thought I'd killed 'em!

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Warning: I have a dangerous tendency to act like I know what I'm talking about.