Simple, you cancel all of them.
(ALL IAH flights cancelled 12 noon cdt 23-SEP to 25-SEP a.m.)
Seriously, I'm sure CO has a very in-depth disaster recovery plan including where to position equipment so that when flight ops resume on Sunday it won't take more than a day or two to get back to 100% of schedule.
The bigger issue is employees, their safety/home/families.
(When flight ops resume can the staff even get to IAH?)