keep pedaling-
i wouldn't keep reading his texts "in case there is an emergency".
there are plenty of emergencies with alcoholics! believe me. some are very real emergencies because of drunken errors, others are fabricated in order to hook you back in.
if there is an emergency, he can call the emergency people instead of calling you, can't he? if he can pick up the phone and dial your number, surely, he can pick up the phone and call the police or ambulance?
as for torturing yourself with these continued texts, why not simply change your phone number? i doubt that will cost anything.
if you continue in reading his texts, he might suck you back into his drama. i resisted no contact for a long time, but it really is much better to not know what is going on. you will be able to move on quicker and with less pain.
naive