When I got my ingedients for my second batch it was during that wicked heat wave. I got the liquid yeast with a couple of ice packs. Of course it was so hot that I'm sure the ice packs didn't make much of a difference and when the yeast arrived it was quite hot so I put it in the fridge immediately.
A week later I take it out and give it a really good shake about 2 hours before my second brew. When I opened it up to pitch it I could hear it fizzing in the container and it sounded quite lively.
After 24 hours of no fermentation I'm definately not panicing, but there's a little voice in the back of my mind saying, "It WAS extremely hot, it COULD be dead"
Is there a way to tell if yeast is dead? I'm sure dead yeast would fizzle like that. I just want to make sure.