How quickly can you ruin yeast?

I bought new ingredients on my lunch break. It was a 60 degree day and I park in a covered garage so I left the ingredients, including the package of Safale yeast, in my trunk. I got waylayed after work and the stuff was in my trunk, in the sun (it warmed up significantly), for a couple of hours. I got home and threw it in the fridge. Think the yeast is ok? I want to brew tomorrow....

 

Make a starter and try it out.

Just curious, how hot did it get in your car?

 

The only way you'll know, and you should be doing it anyway with liquid yeast regardless, is to make a starter. We're not brewing psychics or yeast whisperers, we can't talk to your yeast to find out what it's doing....But a stater will show you if your yeast is viable or not....

 

Safale is a dry yeast and you pitch it straight out of the package. I've never done a starter before.

 

You didn't tell us you had dried.

You should be fine. A dry pack is really a ton of yeast, even if a few cells were damaged the rest will reproduce and ferment your beer.

 

Sorry. I should have specified. I'm new!

 

Safale is all dry... you're slipping Revvy!

You will be fine. If you really want to be safe, make that starter, but I personally wouldn't bother.