As fires ravaged Nowra on New Year's Eve, Blue Mountains MP Trish Doyle was at home on her couch when she received a text message from her son that turned her world upside down.

"I don't think we are going to make it. I love you, mum," the message from her son said. He is a firefighter in Fire and Rescue NSW and narrowly escaped being killed that night.

Ms Doyle, who is Labor's emergency services spokeswoman, faced an agonising 2½ hour wait to discover that her son, who has asked not to be named, had miraculously survived.

He was caught in one of two Fire and Rescue trucks which were left immobilised on New Year's Eve, nearly costing the lives of eight crew members. The incident is now under urgent investigation.