I seriously doubt the nuclear reactor is in danger from a brush fire.
Whole towns have been destroyed by fires like this in the past.
They are not little things. They are pretty much the worst natural disaster Australia faces on a regular basis.
The good news is the time of year - they are most dangerous in high summer.
But this is not just a little brush fire.
In retrospect, it was probably a bad idea to build the cooling towers out of bamboo.
The problem in these cases is the switch yard. If the switch yard is impacted by the fire the plant will become isolated from grid power. they will have to SCRAM or shut down the reactor and go to back up power sources to maintain pump operations.