How cold is too cold?

We've lived in our house for 10 1/2 years... we've had some COLD days... but in the last year somehow our house is not taking the cold weather as well and has decided to have frozen pipes. Last year we had one that burst on Christmas Eve Morning - but thankfully we caught it but were without water for five days. This time? No water leaking, just no water coming out of the shower faucet. We checked all the pipes and found no ice so we went to town trying to heat up the pipes and the area we suspected was the issue. Hairdryers and space heaters... While I watched the water trickle praying for a thawed flow - it finally came! YAY for Water!!! The rest of the day was spent making sure there were no drips and making sure the space heaters weren't burning our house down. I felt the need to bake something. It felt like -33 out - but having the oven on sure felt good. I made these Ice Oatmeal cookies... of course the request had been for Oatmeal Raisin Cookies... ugh... no... also I did not have raisins... so I baked these up and iced them. Andy kept leaving the living room and coming back with cookies, you could say they were a hit. I even grabbed a few for breakfast on my way out the door. Now we are living with the heat set higher and space heaters making our bathroom a sauna... but we have flowing water and that's what matters.

Iced Oatmeal Cookies
1 cup butter, room temperature
1 3/4 cups dark brown sugar
2 large eggs, room temperature
1 teaspoon vanilla extract
2 tablespoons molasses
1 teaspoon kosher salt
1 1/2 teaspoons ground cinnamon
1/2 teaspoon baking soda
2 1/4 cups quick oats
2 cups all-purpose flour
2 1/2 cups powdered sugar
1/2 teaspoon vanilla extract
4–5 tablespoons water

Preheat the oven to 350°F. Line a baking sheet with parchment paper and set aside.
In the bowl of your stand mixer fitted with the paddle attachment, mix the butter and dark brown sugar together for 2 minutes. Add in the eggs, vanilla, molasses, salt, cinnamon, and baking soda and mix for an additional minute, scraping the sides of the bowl as necessary.
Turn the mixer to low speed, add in the oats and flour, and mix until combined.
Cover the dough and place it into the fridge to chill for 30 minutes.
Using a medium (2 tablespoon) cookie scoop, portion out the dough onto the prepared baking sheet leaving 2 inches in between for spreading. Bake for 10-12 minutes (see note).
Transfer the cookies to a wire rack to cool completely.
Icing: Whisk the powdered sugar, water, and vanilla extract together in a medium bowl until smooth.
Dip the tops of each cooled cookie into the icing and place back on the wire rack to set.