NPR's Leila Fadel speaks with Axios senior climate reporter Andrew Freedman about the incoming Arctic blast that's expected to bring dangerously cold temperatures to large parts of the U.S.

Good morning. ANDREW FREEDMAN: Good morning. Thanks for having me. FADEL: So, you know, I'm already cold, and now an Arctic blast. What even is an Arctic blast? FREEDMAN: So this is essentially a ...