i bought a milk stout extract kit from Austin Homebrew. Same kit that I had brewed in April, and I wanted to do it again. Without thinking, I hit the reorder button. Well, temperatures were milder in April, and both time I bought Wyeast with a cold pack. When I opened the kit today, the cold pack was actually very warm. My question is, is that yeast dead after riding from Austin, Tx to Monroe, LA in late July heat. Can I brew tomorrow? Or buy some dry yeast and do it next weekend?