GA: Oh no! Half the watermelon kaput already!! Too windy/hot?

Oh no!  About half of the watermelon seedlings transplanted yesterday look dead today!  They're all wilty and dead-looking even though it was late evening.  The other ones look good.  I'm guessing maybe yesterday's insane wind + heat was too much for the less strong ones.

Started 3 more Blacktail watermelon seeds tonight but now the pack is empty so I'll buy more.