6mo old vinyl 36k gal in ground pool with no heater. Went to Florida for vacation. Dumb me didn't close the pool. Forecasted temps back home were not bad when I left (28 lows) so I set the pump to run from dusk till dawn. Unfortunately, weather folks were wrong. Tonight it will get down to 10 degrees and will not reach 25 for a high tomorrow So the pipes wouldn't freeze, I had a friend go by and turn the pump on yesterday to round the clock. Problem is, this includes the big slide running too. Due to it being Christmas and treacherous roads back home, i don't have anyone to check on it or make big decisions. What is the worst that could happen?