The **polar vortex** is an area of cold air around the Arctic that is currently expanding southwards, causing severe winter storms across the US.
Over **60 million people** are affected by the cold spell, where temperatures may plunge to as low as **-50C (-60F)**.
This weather phenomenon can bring sub-freezing temperatures to regions as far south as the **Gulf Coast and Florida** Peninsula.
There are two types of polar vortexes: **tropospheric**, which occurs at lower altitudes, and **stratospheric**, which is currently influencing the severe weather conditions.
Climate change has been suggested to weaken the polar vortex, making it more susceptible to disruption and extending its reach further south.
For more details, visit the original article here.