I live in San Antonio, and my uncle is a prominent donor for the school. I just got off the phone with the UTSA Ticket Office. The truth is this... UTSA athletic administration is not happy UH cancelled the game for two reasons. 1) It causes a logistical nightmare for them. 2) The team was in Austin and technically could have played the game. However, the administration can't come out and say this publicly... at all. They are distinctly aware of how callous they would appear in the wake of the Harvey disaster. They are frustrated because all of the other Houston area teams, FBS and FCS are playing, especially the away teams.
They are still deciding what to do, but it is leaning towards cancelling the game for the year. They don't want to schedule Dec 2nd tentatively, and then have to cancel because either UTSA or UH is in a conference championship game, which is a likely scenario for both teams. To take it a step further, UTSA is considering cancelling the rest of the series under pressure from some fans, or at least force UH into a situation where we have to come to San Antonio before the return game to Houston in 2022. There is an opening in 2019 and 2020 for both UH and UTSA. Scheduling in 2019 would force UH into three away games for OOC schedule, so 2020 is more likely.
As far as refunds, the ticket office expects information on a final decision "soon", as in before the end of the week. Nothing is assured at this point. If the game is canceled, a full refund will be made. If it is moved, tickets will be honored, but I highly doubt a refund will be issued for people who can't make the reschedule. My understanding - it is Dec 2nd or nada. My guess is if there is a reschedule, UTSA is going to ask for a minimal fee for the loss of revenue this year.