1~ you need a more reliable thermometer and hygrometer... digital. i wouldn't trust the one you have to be accurate. i had one of those at first and when i upgraded i was amazed to see the difference
2~ even if you only had two hours at home, that's still plenty of time to give your mom your friend's number. or place a call to him yourself real quick
3~ if you had say, a dog or cat, and it had a severe burn like you're describing, would you just leave it alone and not worry about it because it's not a "life and death" situation?