Hot days dry out fuel faster, preheat it and often bring strong winds (especially around cool changes). This is what makes hot days more dangerous than other days. It’s rare to self-ignite, it’s almost always lightning or human activity (arson, powerlines, machinery sparks, cigarettes, campfires etc.).
windy days lift dust into the air , that dust has a lot of flammable organic matter, at certain temps that dust can ignite, like in a coal mine or flour mill
the blue haze over forests is eucalyptus oil, on very hot days that can spontaneously combust too, like a BLEVI over a petrol tank
I was just reading about bushfires, and I still don’t really get what an ignition source could be, besides humans and lightning.
Hot days dry out fuel faster, preheat it and often bring strong winds (especially around cool changes). This is what makes hot days more dangerous than other days. It’s rare to self-ignite, it’s almost always lightning or human activity (arson, powerlines, machinery sparks, cigarettes, campfires etc.).
bottles or glass shards on the ground can intensify light , making heat then ignition
it used to be that smokers throwing butts were a known cause of fires but that’s not so much anymore
sparks from exhaust pipes
When black Saturday happened, from where I was living i could see an entire side of a mountain on fire. It was unreal.
From a lightning strike.
windy days lift dust into the air , that dust has a lot of flammable organic matter, at certain temps that dust can ignite, like in a coal mine or flour mill
the blue haze over forests is eucalyptus oil, on very hot days that can spontaneously combust too, like a BLEVI over a petrol tank