Polar vortex. USA. Temperature to drop to -30 C or F, the same. To hit tomorrow extending over the week.
https://www.cbsnews.com/news/polar-vortex-2021-to-bring-brutal-cold-and-snow-this-weekend/
https://www.cbsnews.com/news/polar-vortex-2021-to-bring-brutal-cold-and-snow-this-weekend/