I clicked my ruby heels together and look what happened

I'm HOME!!!!
It feels so good to be back. Will post something about Philadelphia and DC later...it's a little daunting to think of how much I have to say about the last week and tour as a whole...

For now though, I read this in the InStyle magazine that I bought to get rid of money on my per diem card in the airport:
"Straightening your wet strands with a traditional flatiron is damaging-the water actually boils inside the hair's cortex. However, dedicated wet-to-dry flatirons use technology that converts the H2O in your hair to steam."

"Converts the water to steam"....isn't that...boiling?

Could someone explain the difference to me?