Back in 2012 I had the chance to visit Zurich and a cold snap happened at the same time. From 0'C when I arrived the temperature dropped to -12'C by the time I left. It was so cold I had to take a taxi to the office even though it was just a short 10 minute walk. The taxi drivers actually got mad at me, but I told them that I come from a tropical country and my body's not used to such cold weather. My doctor also forbade me from participating in a planned ski trip. He said that I would've been more prone to getting a virus at very cold weather. I monitored the news back then and it was reported that over 200 people died in Europe because of the cold snap.
I watched in the news today that the US is experiencing the polar vortex and the coldest temperature recorded was -37'C. Brrrrr! -12'C was bad enough, I think I would instantly freeze at that temperature. I remember when I was a kid I used to ask my Mom why we it didn't snow in the Philippines. She didn't give me a scientific explanation, but said that we're in the tropics and that if it snowed here a lot of people will die because of the cold. I asked her the question several times and she always gave the same answer. I eventually agreed with her (after several years of science classes) and never wished to have snow in my country. And well I'm like my Dad, I get cold easily.
I hope and pray that my family and friends in countries affected by the polar vortex will keep warm.