Ice: Beware, it's everywhere

You know that the freezing point of water is 32 F, so when it gets down there it becomes important to drain those sumps in the wing and, in some cases, the engine. Little ice particles or chips may not cause any problems, but they could.  Certainly water in a fuel line allowed to freeze would, if enough ice is formed.  Another time, I will get into surface accumulation on the airplace, in flight and on the ground.