Would phone contact or contact via something like skype help? You may be able to arrange to have a certain amount of electronic contact with him over the weekend.
If you're in the US or Canada, you might want to try calling 211. There may be some form of outpatient or drop-in mental health services that you could access. I don't know if there necessarily would be services available, but it might be worth a try.
Do you have any friends or relatives that you could have contact with?