[hankbrown]

How do you start fires of this size? Just toss a match? Even as dry as it is, would it not take more than that?

[Fitzcarraldo]

We only know about the one (?) successful attempt.
If fire danger is high , even a tossed cigarette can do it.

[aCookieMomster]

Match, cigarette...even a spark from a lawnmower hitting a rock have all set fires in So. CA.

With the dry brush and the dead trees it's a combustible combo.