Steel requires 2750° F. to melt (sometimes 2500), but simple aluminum will melt at 1220°. Therefore, online statements claiming 'wild-fires cannot burn metal' can be misleading. The photographs of the vehicles above show only certain metals melted but not all.
Nonetheless, the facts which isolated cars (not positioned within within a large fire) are have been totally destroyed and buildings can also be seen in other photographs with everything completely burnt to a low-height pile of rubble.
Brass and Bronze will require heat in excess of 1500° F but this isn't out of the realm of possibility for a large enough fire.
Photograph of Microwave (D.E.W.) Weapons, also Appears as this Pages Background
2017, 100 Fires began simultaneously in California and all show signs of commencing from the sky above.