What do you call those forest fires taht start on their own and are probably caused by the sunlight...?

Question

... in a case where for example, sunlight enters a car through a window. The heat is so much that it starts a fire.
Is there a special name for those kind of fires?
My teacher said there were, but she forgot what it was.

Answer 1

Spontaneous Combustion?

Answer 2

Here's everything (I guess) on wildfires: http://en.wikipedia.org/wiki/Forest_fire

It doesn't say anything about the sun causing those fires, mostly arson and lightning, but it might also prove useful to what you wanted to know.

Answer 3

spontaneous combustion?