The Wyeast Activator Pack is activated and swollen

My Wyeast Activator is activated. Is it okay to use?

Place the yeast in the fridge to get them dormant again then proceed as normal. Ideally, do a yeast starter 1-3 days before target brew date. The sooner you can brew with it the better. If none of these is an option for you then contact us and we can proceed from there.

If the yeast feel warm, it does not mean that they are dead. Yeast are surprisingly tough and it takes quite a spike in temperatures to really effectively kill them. You may experience a lag time longer than expected due to cellular damage, but likely everything will be fine as they are still able to propagate and spawn fresh and viable cells. Preparing a yeast starter is an excellent way to ensure yeast health and viability.