Caught early but minor signs regardless,... snow caused power outage

I went to soak my snakes this evening and noticed that one of them is
starting to show early signs of an upper respiratory infection the recent
snow storm killed the power for a short time to where my snakes are
housed but luckily only one has the symptoms so far trying to figure out
what temp range i need to keep him at till i can get him to a vet

I keep my ambient on the warm side at 90, ground temp at 90, ambient cool side at 80 and aim for 55% humidity. Don't do anything dramatic. What symptoms are you experiencing? What were the temps on average when the outage occurred?