Bay, I'm surprised that half of what you grow down there doesn't come up "pre-dehydrated". You could just stick everything out on the sidewalk for an afternoon--no dehydrator required!
It was only a few hours I bet it will be fine. Seeds in nature go through a lot and still produce so if I had to bet on it I bet they will be fine. You caught it in time which was the good thing.
I just checked a little while ago and found my bok choy up. It was planted the same day, but not cooked. The red mustard I got from Bay has one or two up and will probably be ready to go under the lights this evening.
Speaking of what seeds naturally go through, I wonder how tomato seeds fare in the 110 degree temps they get in TX? The thought gives me hope, anyway.
I remember being a very "open-minded," young guy and showing up at the Coeur d'Alene sewage treatment plant one summer morning. I told the guy that I'd like some stuff for my garden.
He pointed it out in the corner of the yard. The pile was carpeted with tomato plants! I left without it . . .
I was a little worried looking at the chart on Steve's link. 104* was too much for most things (no germination), except okra, which loves it hot. I guess it helps that it was only briefly. Or that two degrees less. I am still waiting to make sure they are vigorous. Whew... I will not do that again.
But back to the sewage/manure example... Composting manure gets much hotter than that and it always seems there are lots of tomatoes popping up in my compost pile. Or perhaps just those on the outside survive it.