 So we've got flames that are now up the full length of the bark and a couple of embers coming off. So the flame temperature is going to be in the order of about 900 to 1100 Celsius. In front of a large bush fire you'll probably find that you don't just get one ember but lots of embers landing. If any of those are starting spot fires then it'd be far too many for you to actually be able to control safely. So if you've got spot fires landing you need to take cover. There's no questioning the facts. Learn more at emergency.vic.gov.au Authorized by the Victorian Government, Melbourne.