Remembering Fire Safety

My 16 year old told me this morning why she was so tired:

She woke up in the middle of the night because she could smell smoke. She looked around and saw nothing and was so tired that she fell back asleep! A little bit later, her 14 yr old sister woke her up because she too had been awakened by the smell of smoke. They got up and searched their room. 14 yr old's hair striaghterner had been left on and had fallen. Carpet was melting and causing the smell.

I'm freaked because this could have been the cause of a fire in my house that would have started in my teenagers room which is also in the way of the stairs. I'm glad they found it before things started really catching fire, but I am freaked nonetheless.