Comment by Arodex

And it does burn, but here are the history of fire:

https://fr.wikipedia.org/wiki/Incendies_en_for%C3%AAt_de_Fon...

Notice how the last was worse by one or two orders of magnitude.

You can handwave all you want the this and the southwest forests are particularly flammable, but what you are pointing out are only "canaries in the coal mines": they are the first to burn, but other forests will follow suit if global warming continues.