When you tried to start it this morning was the car still on empty?with such cold conditions and leaving the car on empty is not a good thing in general,probably the fuel system is frozen because gas being on empty,try to grab a bottle of heet to add in the gas,also would check the battery voltage,the oem battery has a short lifespan,changed mine in october under warranty to an upgraded BXT-65-850 which is a better and more powerful battery with more cca.