This is your latest idea.

It's unique, it's game-changing, it's huge!

But you can go even bigger with AI-powered PDF spaces in Acrobat Studio,

turning your files and links into actionable insights and content,

plus share projects and collaborate seamlessly while keeping everything private and secure.

So your excellent idea stays yours.

Do that with Acrobat.

Learn more and try it out on Adobe.com.

Live from ABC News headquarters in New York City, this is Good Morning America. Good morning America. More than 40 million on

alert for the dangerous Arctic blast. The Hoosiers on top of the world is one of the most incredible

comeback stories in sports history. There are a lot of believers now, I would say, in Indiana.

Their first ever national championship for football basketball we're familiar with. Yes, we are. Football not so much, but now we are. It all changes. What a night, Robin. Okay, we're going to have much more live from a little chilly Miami, but we're not complaining coming up. We can feel that enthusiasm. We can feel some of that chill. Thank you, Robin and L. We're going to hear more from you, but we begin with that chill as millions of Americans are waking up to bitter cold temperatures this morning.

Rob and chilly with a jacket on in Miami. Okay, Robin. You know, the wind chills, they're below zero in some parts of the country. Gender standing by with how long this will last.

But first, Stephanie Ramos starts us off

in Chile, New York City.

Good morning, Stephanie.

Michael, good morning.

We're going to feel some of the coldest air of the season today.

Multiple rounds of Arctic air headed east

after battling the Midwest. This morning, a brutal blast of Arctic air fueling heavy snow, impacting millions from the Midwest to the northeast.

A massive 100 vehicle pile up stretching for miles on this Michigan interstate amid wide out conditions.

It was just like dominoes, bomb, bomb, bomb,

...