A hero has emerged from all this weather calamity . . . And her name is KRISTEN BELL. Check out what she's been up to the last few days . . .

Kristen was filming a movie in Orlando, and wasn't able to evacuate in time, so she got stuck at her hotel. She saw a Tweet from her "Frozen" co-star JOSH GAD. He plays Olaf the snowman.

 He said his parents, his brothers, his sister-in-law, his niece, and  his nephew were stuck in Florida, too. So she got them a room at her  hotel.

 Josh Tweeted, quote, "They don't make them like this girl. Thank you Kristen. You are truly an angel sent from above."

And Kristen's heroics didn't end there. Actress JENNIFER CARPENTER from "Dexter" saw what she did for Josh's family and asked for some help, too. 

Her aunt and her 82-year-old grandmother were stuck in a house in Tampa. They had been planning to ride out the storm by hiding in a closet and wearing BIKE HELMETS. So Kristen got THEM to her hotel, too.

And if that's ain't enough . . . Kristen went to a shelter in Orlando and sang the "Frozen" song, "For The First Time In Forever".