Apparently, Denver dropped 40 degrees F in about an an hour! Northern Idaho hit -59 F!!!!
Growing up in northern Ontario, the coldest I can recall was -54 C, which is -65 F. The frost was coming in through the concrete basement walls of my uncles house about 3-4 feet below ground level!
In southern Ontario, we're expecting, rain, then a flash freeze and then snow into the weekend, with temps around -10 C. Expecting high winds though, so we'll likely lose power due to iced up tree limbs breaking and falling on hydro lines. Filling the tubs now for flushing water!