They won't replay the match, thats for sure. The ITA will either make it a cancelled match and it will be wiped from the teams records, or they will give the win to A&M 7-0.
The only one situation I know of is the Ohio St.-Baylor match from last year. OSU came to Waco, worked out in the afternoon in shorts and t shirts. However, the rule is that if the temperature is going to be below 50 at any time during the estimated match time, a team can pull out of the match. OSU decided that since it was going to be 48 or so after the match started, they didn't want to play and they couldn't go indoors, so they went home. Basically, OSU wanted to play it indoors, because they knew they would win inside.
Chicken s--t if you ask me.