Doesn't it need to get up to 300°C (the flash point of wood) for things to spontaneously combust from the ambient temperature?
I agree with you that hot and dry conditions make wildfires much easier to start and spread, but that's been having an effect in residential parts of California over the last few weeks, where the temperature has at most been around 100-110°F (38°-43°C).
(And I do agree that, metres from a moving fire, the temperature is probably past the flash point of many substances, but I wouldn't call that climate, I think.)
Rather than spontaneously combusting; in a large bushfire that is generating firestorms, the pressure differential can cause nearby houses to literally explode. My late uncle who was at the Mt Macedon fires during Ash Wednesday told the story of getting trapped by the fire and sheltering with another firefighter in a house that was ripped apart around them - they ended up sheltering in a concrete toilet block as the fire raged past.
I don't think (hope!) the OP isn't claiming spontaneous combustion.
I'm in Australia (Adelaide) too and the bushfire threat is real, but it's because when it's super hot any spark in dry eucalyptus leaves takes off extremely quickly.
I agree with you that hot and dry conditions make wildfires much easier to start and spread, but that's been having an effect in residential parts of California over the last few weeks, where the temperature has at most been around 100-110°F (38°-43°C).
(And I do agree that, metres from a moving fire, the temperature is probably past the flash point of many substances, but I wouldn't call that climate, I think.)