It is going downbelow freezing. Get a gallon of anti freeze into your freash water cooled motors tonight or they may crack the block or pop your freeze plugs.Or put a heater near the motor so it doesnt freeze. Suppose to be like this all week and I would hate to hear about people losing motors for something so simple to prevent. I just did mine and it is COLD out. It is a lot easier to prevent than to fix!!!!