How cold can it get?!

So, it's officially COLD here in Wisconsin!! I just got on weather.com to check the temperature--currently -5. But, it feels like -26 with the wind chill. They even cancelled our Sunday Church meetings. It's the first time we've ever heard of Church being cancelled for freezing cold temperatures. How did civilization ever make it's way up this far? I'm sure people came here in the Spring several hundred years ago and started to farm the land, and thought it was just fine, and then when winter rolled around, they thought to themselves "We must have traveled too far North, eh?" But, they couldn't move further south since they had already established their farms. And here we are... Fortunately for us, we have it pretty easy--cars, heated homes, hot chocolate. It could be a lot worse, I suppose. We did go sledding last weekend, and had a lot of fun. Lia didn't hesitate to hop on the tube and let Dad push her down the hill, going pretty fast. Jaxon decided he wasn't ready for that, so he went down with Dad and Lia. Maybe if it warms up (so the temperature is at least 10-20) we'll go again. The snow will definitely still be there!!