UPDATE 7.20pm: There were two firefighters injured, not three as previously reported, and they are from the Nambucca Heads Fire and Rescue brigade.
This from NSW Fire and Rescue:
Two of our firefighters have been injured at a bushfire on the North Coast today, when a tree fell across their truck.
Fire and Rescue NSW Commissioner Paul Baxter said:
"On Sunday 10 November, Fire and Rescue NSW crews from the Nambucca Heads area were in attendance at a bushfire on Kian road from 10:30am.
"At around 3:14pm, a falling tree impacted one of our Fire and Rescue trucks.
"One firefighter was partially outside the truck when the tree fell, causing injuries to her head and neck.
"The impact of the tree falling on the roof also caused head injuries to another firefighter inside the truck.
"Both firefighters were attended to by NSW Ambulance paramedics and have been transferred to hospital in a stable condition.
"Fire and Rescue NSW remains updated on their recovery."
Previously: A 54-year-old woman has just been airlifted to John Hunter from the Hennessey Tape Oval with head and neck injuries.
It is believed the woman is a firefighter with the RFS and was in a vehicle when it was struck by a falling tree.
There are reports that two other firies were injured in the same incident, although only the woman was taken to hospital via rescue helicopter.
She is believed to be in a stable condition.
We're still waiting on details from the RFS Fire Control Centre.
We'll continue to post updates as we receive them.