How can sp_blitz help investigate what caused TLog to fill up Non-uncommon scenario:  Something has ran wild and caused the TLog for a patifular Db to fill and everything has stopped.  How can sp_blitz show us some info on what led up to this point? What about sp_whoisactive?
No, sp_Blitz doesn't track that kind of thing. A better approach would be querying LOG_REUSE_WAIT_DESC.