Paramedic killed by tree in Blue Mountains

A woman who died after a tree fell on a car in NSW's Blue Mountains has been identified as an NSW Ambulance paramedic.

Authorities found the woman and a man inside a Volvo sedan crushed under the large tree on Victoria Street in Katoomba about 7pm on Thursday.

Dearne Fulcher, aged in her 40s, suffered fatal injuries and could not be revived.

The driver of the car, a man aged in his 20s, was freed and flown to Westmead Hospital with head and chest injuries.

He remains in hospital in a serious condition.

On Friday, NSW Ambulance confirmed Ms Fulcher was one of their senior paramedics and clinicians, with more than 25 years experience.

The organisation described her as a "shining light in her community and her profession".

"Always an extraordinary paramedic, Dearne displayed an enormous passion for delivering first-rate care," NSW Ambulance wrote in a tribute posted to Twitter.

"We, and the community of Katoomba, are forever indebted to Dearne's service."

Ms Fulcher, who started with NSW Ambulance in 1994, was awarded a Bronze Bravery medal in 2002 for her work treating patients following a "devastating" series of fires at Medlow Bath.

What caused the tree to fall remains unclear but a severe weather warning was in place for damaging winds across the area.

Witness Samantha Jones said it sounded "like a bomb going off".

"It was the loudest explosion I'd ever heard. I didn't know what had happened," she said.

"I thought seriously a bomb had been dropped."