Cool Climate in northern countries Normally this type of climate will appear in between September to march by that time temperature freezes below 0 Degrees as well .All water bodies will getted Solid mode to regain it's original position all we need is to heat up the thing as soon as possible.Even Lubricant oil's get harden than any other thing to avoid these type of solid matter just some little amount of alcohol into the oil.After adding Alchol into the Lubricent oil Oil doesn't loose its original physical shape as well and next coming to the transformers some alcholic oil is used in transformers too to avoid 
