A lot of factors go into the decision.
Would the emergency personnel and first responders who work a game be available, how about all the people who work the games, what was their availability? Would they need local hotel rooms to house people evacuated from the area? Would the interstates be clogged up with people evacuating?
All of that and more have to be considered.
None of that was known when the decision to reschedule the game was made.