It was 2 degrees F (-17C) when we woke up yesterday morning, and Mom found this in the kitchen:
Our house has double paned, insulated windows. One of the panes in the kitchen window cracked and broke. You can click the pictures to biggify. If you click this second one, you can see a piece that broke off and fell in the space between the two panes.
Now that's what I call freaky. This morning it was supposed to be -3F (-19C), but the temperature is predicted to be about 53F (12C) on Tuesday. Go figure.
The landlord has been notified.