From SOS
SPOILER ALERT.

Greenlee (Rebecca Budig) and Ryan (Cameron Mathison) are trapped together for at least part of the tornado and are two characters who will survive. Carruthers leaves us with one more hint, that whoever passes away will continue to play a significant role after their passing and that it will stretch out for months and years to come.

My Opinion:
Now what the hell does that mean? Someone dies but plays a role after their passing and will stretch out for years to come???