It is -2F here right now with wind chill gusts reaching into the -30’s

It dropped from the 40’s to the single digits in less then two hours overnight. Crazy cold for Southern Ohio.
I went out this morning brought hot water with me in a bowl and added feed to the hotwater for a mash. They came down from the roosts to eat the warm food. Bucket heater is working well and their water remains unfrozen. Everyone looked good and Oreos comb (my bellwether for frostbite) looks healthy and is the normal pink color.
I did not open the pop door today. I don’t think I should since it could let in wind. Is this what you guys do in weather this brutal? I usually trust them to decide but this time my gut is saying keep in the coop for today.
So far so good!
Hope everyone else who is experiencing this weather is making out well!!