My T is always available in an emergency. Her voicemail does say to call a crisis line, go to the ER, or call 911 if you feel that you're an immediate danger to yourself or others. However, she's always been available and willing to talk to me when I've called. The only time my T isn't available is when she's on vacation.

My pdoc is also available, but I would probably try to get a hold of my T first.

I do think it's important to ask your T what she would prefer you to do (contact her, call a crisis line, etc) so that you will have that information should the need arise.