out in chevy chase maryland, good evening. reporter: good evening. absolutely gorgeous here behind me. it is allbout layering up and staying warm. and customers choosing trees very, very quickly. some people are very picky so they take 20 minutes. when it s cold, it s like five minutes. this day three of a very cold time. reporter: what makes it worse, the win making frost feel like a lot moreike 10. if you re outside, it is all about one thing. you have to dress warm out here. two pairs of pants n. two socks. reporter: layers. socks, gloves, honestly, layers. montgomery county putting their hypothermia plan in place. the washington humane society reminding people to think about their animals. we are getting a lot of calls about dogs left outside in the cold weather. right now getting a dozen calls a day. it is 26 degrees today. it is bringing inhot water and cold weather. reporr: pets need to be with warm bedding. the temperatures still too cold for cus