Fire ripped through the main resort in Monkey Mia last night, destroying staff quarters.
Monkey Mia Dolphin Resort assistant resort manager Nic Polyblank said six staff dongas were destroyed in the fire.
Mr Polyblank said three of the staff residences were in use at the time but no one was inside when the fire broke out and no one was hurt.
He thanked volunteer firefighters from nearby town Denham for their efforts.
"The effort by the Denham State emergency services was absolutely brilliant – their response time was 25 minutes,” Mr Polyblank said.
“A fire of that size we were not going to be able to put out, so we needed the town’s help.”
Mr Denham said it was “business as usual” at the resort today and the staff whose residences had been destroyed had been rehoused.
“We are just keeping the affected area safe and making sure nobody is put in harm’s way,” he said.
“It is very small in the whole scheme of the resort.”
Jurien Bay woman Jennifer Walmsley, 48, was at Dolphin Resort with her husband when the blaze broke out just before 7pm.
She described chaotic scenes as tourists and staff tried in vain to extinguish the fire before help arrived.
"We were sitting with a couple of staff when we first saw it," she said.
"By the time we raced out, two cabins and some trees had gone up.
"It just went up so quickly."
A Department of Fire and Emergency Services spokesman said the fire caused $300,000 damage.