They are quite often expected to turn off in emergency response...

They are quite often expected to turn off in emergency response situations.
They aren't the only electrical things that are shut off as part of bushfire mitigation.
Distribution lines can have their power cut due to previous occasions when they were found to start fires.
Spinning windmills can be a hazard to low flying aircraft which are dumping water as pilots might not see the moving blades in the smoke.