It was bound to happen. Brewing the house APA today...... people visiting, another friend who is nooober than I am brewing and needing help....two burners... too much going on at the same time. Partial mash kit, put the wort in the fermenter with the appropriate amount of cold water, ran the O2 for a few minutes and pitched the yeast......at that very moment realizing I did not know the temperature of the liquid..... A quick measurement told me 84º.......
So I followed Charlie's advice, had a home brew and am not worrying.......yet. I will see if it gets going, if it does good.
Now for the question: If it doesn't get going, and I killed the yeast, is there any rule that say I can't pitch another pack of yeast?