With extreme cold across much of North America, you may be wondering: If wind chill tells me how cold it feels… why don’t we just show that? Because one number tells you how cold the environment is, and the other tells you how fast living things lose heat. Together, they give you the full risk picture — especially during Arctic air outbreaks and official cold warnings from Environment and Climate Change Canada and the National Weather Service. More information isn’t overcomplicating the forecast